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Fix get_users_in_room mis-use in transfer_room_state_on_room_upgrade #13960

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Oct 1, 2022
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Fix get_users_in_room mis-use in transfer_room_state_on_room_upgrade #13960

merged 2 commits into from
Oct 1, 2022

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MadLittleMods
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@MadLittleMods MadLittleMods commented Sep 29, 2022 •
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Fix get_users_in_room mis-use in transfer_room_state_on_room_upgrade

Spawning from looking into get_users_in_room while investigating #13942 (comment).

See #13575 (comment) for the original exploration around finding get_users_in_room mis-uses.

Related to the following PRs where we also cleaned up some get_users_in_room mis-uses:

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@MadLittleMods
Fix get_users_in_room mis-use in transfer_room_state_on_room_upgrade
3b7f1df 
Spawning from looking into `get_users_in_room` while investigating
#13942 (comment).

See #13575 (comment)
for the original exploration around finding `get_users_in_room` mis-uses.
@MadLittleMods MadLittleMods added A-Performance Performance, both client-facing and admin-facing T-Task Refactoring, removal, replacement, enabling or disabling functionality, other engineering tasks. and removed A-Performance Performance, both client-facing and admin-facing labels Sep 29, 2022
MadLittleMods
MadLittleMods commented Sep 29, 2022
View reviewed changes
synapse/handlers/room_member.py
@@ -1150,8 +1150,8 @@ async def transfer_room_state_on_room_upgrade(
logger.info("Transferring room state from %s to %s", old_room_id, room_id)

# Find all local users that were in the old room and copy over each user's state
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@MadLittleMods MadLittleMods Sep 29, 2022 •
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We now do what this comment says, but is this comment actually correct?

I don't see anything previously where we checked for is_mine_id(user_id) in the downstream functions here. It feels like we happily copied everyone over.

It makes sense to only copy over the push rules for the local users (transfer_room_state_on_room_upgrade -> copy_user_state_on_room_upgrade -> copy_push_rules_from_room_to_room_for_user)

I'm not sure about transfer_room_state_on_room_upgrade -> copy_user_state_on_room_upgrade -> copy_room_tags_and_direct_to_room though.

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I'm fairly sure account data (and hence m.direct data) and room tags can only be set for local users.
ie. we used to copy over nothing for remote users, so this change looks alright.

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Woot! Good news to move this forward 🚆

ie. we used to copy over nothing for remote users, so this change looks alright.

I trust you but can you link where you see this constraint? It's not immediately obvious to me trying to follow some functions down.

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There's no check in the copying method or its callees. It's just not possible for us to insert account data and room tags for remote users into the database.

This was referenced Sep 29, 2022
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@MadLittleMods MadLittleMods marked this pull request as ready for review September 30, 2022 00:37
@MadLittleMods MadLittleMods requested a review from a team as a code owner September 30, 2022 00:37
squahtx
squahtx approved these changes Sep 30, 2022
View reviewed changes
synapse/handlers/room_member.py
@@ -1150,8 +1150,8 @@ async def transfer_room_state_on_room_upgrade(
logger.info("Transferring room state from %s to %s", old_room_id, room_id)

# Find all local users that were in the old room and copy over each user's state
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I'm fairly sure account data (and hence m.direct data) and room tags can only be set for local users.
ie. we used to copy over nothing for remote users, so this change looks alright.

@MadLittleMods MadLittleMods merged commit a52c40e into develop Oct 1, 2022
@MadLittleMods MadLittleMods deleted the madlittlemods/fix-get_users_in_room-misuse-in-transfer_room_state_on_room_upgrade branch October 1, 2022 01:10
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Thanks for the review @squahtx and @clokep 🦁

squahtx pushed a commit that referenced this pull request Oct 4, 2022
Merge tag 'v1.69.0rc1' into develop
f0019f3 
Synapse 1.69.0rc1 (2022-10-04)
==============================

Please note that legacy Prometheus metric names are now deprecated and will be removed in Synapse 1.73.0.
Server administrators should update their dashboards and alerting rules to avoid using the deprecated metric names.
See the [upgrade notes](https://matrix-org.github.io/synapse/v1.69/upgrade.html#upgrading-to-v1690) for more details.

Features
--------

- Allow application services to set the `origin_server_ts` of a state event by providing the query parameter `ts` in [`PUT /_matrix/client/r0/rooms/{roomId}/state/{eventType}/{stateKey}`](https://spec.matrix.org/v1.4/client-server-api/#put_matrixclientv3roomsroomidstateeventtypestatekey), per [MSC3316](matrix-org/matrix-spec-proposals#3316). Contributed by @lukasdenk. ([\#11866](#11866))
- Allow server admins to require a manual approval process before new accounts can be used (using [MSC3866](matrix-org/matrix-spec-proposals#3866)). ([\#13556](#13556))
- Exponentially backoff from backfilling the same event over and over. ([\#13635](#13635), [\#13936](#13936))
- Add cache invalidation across workers to module API. ([\#13667](#13667), [\#13947](#13947))
- Experimental implementation of [MSC3882](matrix-org/matrix-spec-proposals#3882) to allow an existing device/session to generate a login token for use on a new device/session. ([\#13722](#13722), [\#13868](#13868))
- Experimental support for thread-specific receipts ([MSC3771](matrix-org/matrix-spec-proposals#3771)). ([\#13782](#13782), [\#13893](#13893), [\#13932](#13932), [\#13937](#13937), [\#13939](#13939))
- Add experimental support for [MSC3881: Remotely toggle push notifications for another client](matrix-org/matrix-spec-proposals#3881). ([\#13799](#13799), [\#13831](#13831), [\#13860](#13860))
- Keep track when an event pulled over federation fails its signature check so we can intelligently back-off in the future. ([\#13815](#13815))
- Improve validation for the unspecced, internal-only `_matrix/client/unstable/add_threepid/msisdn/submit_token` endpoint. ([\#13832](#13832))
- Faster remote room joins: record _when_ we first partial-join to a room. ([\#13892](#13892))
- Support a `dir` parameter on the `/relations` endpoint per [MSC3715](matrix-org/matrix-spec-proposals#3715). ([\#13920](#13920))
- Ask mail servers receiving emails from Synapse to not send automatic replies (e.g. out-of-office responses). ([\#13957](#13957))

Bugfixes
--------

- Send push notifications for invites received over federation. ([\#13719](#13719), [\#14014](#14014))
- Fix a long-standing bug where typing events would be accepted from remote servers not present in a room. Also fix a bug where incoming typing events would cause other incoming events to get stuck during a fast join. ([\#13830](#13830))
- Fix a bug introduced in Synapse v1.53.0 where the experimental implementation of [MSC3715](matrix-org/matrix-spec-proposals#3715) would give incorrect results when paginating forward. ([\#13840](#13840))
- Fix access token leak to logs from proxy agent. ([\#13855](#13855))
- Fix `have_seen_event` cache not being invalidated after we persist an event which causes inefficiency effects like extra `/state` federation calls. ([\#13863](#13863))
- Faster room joins: Fix a bug introduced in 1.66.0 where an error would be logged when syncing after joining a room. ([\#13872](#13872))
- Fix a bug introduced in 1.66.0 where some required fields in the pushrules sent to clients were not present anymore. Contributed by Nico. ([\#13904](#13904))
- Fix packaging to include `Cargo.lock` in `sdist`. ([\#13909](#13909))
- Fix a long-standing bug where device updates could cause delays sending out to-device messages over federation. ([\#13922](#13922))
- Fix a bug introduced in v1.68.0 where Synapse would require `setuptools_rust` at runtime, even though the package is only required at build time. ([\#13952](#13952))
- Fix a long-standing bug where `POST /_matrix/client/v3/keys/query` requests could result in excessively large SQL queries. ([\#13956](#13956))
- Fix a performance regression in the `get_users_in_room` database query. Introduced in v1.67.0. ([\#13972](#13972))
- Fix a bug introduced in v1.68.0 bug where Rust extension wasn't built in `release` mode when using `poetry install`. ([\#14009](#14009))
- Do not return an unspecified `original_event` field when using the stable `/relations` endpoint. Introduced in Synapse v1.57.0. ([\#14025](#14025))
- Correctly handle a race with device lists when a remote user leaves during a partial join. ([\#13885](#13885))
- Correctly handle sending local device list updates to remote servers during a partial join. ([\#13934](#13934))

Improved Documentation
----------------------

- Add `worker_main_http_uri` for the worker generator bash script. ([\#13772](#13772))
- Update URL for the NixOS module for Synapse. ([\#13818](#13818))
- Fix a mistake in sso_mapping_providers.md: `map_user_attributes` is expected to return `display_name`, not `displayname`. ([\#13836](#13836))
- Fix a cross-link from the registration admin API to the `registration_shared_secret` configuration documentation. ([\#13870](#13870))
- Update the man page for the `hash_password` script to correct the default number of bcrypt rounds performed. ([\#13911](#13911), [\#13930](#13930))
- Emphasize the right reasons when to use `(room_id, event_id)` in a database schema. ([\#13915](#13915))
- Add instruction to contributing guide for running unit tests in parallel. Contributed by @ashfame. ([\#13928](#13928))
- Clarify that the `auto_join_rooms` config option can also be used with Space aliases. ([\#13931](#13931))
- Add some cross references to worker documentation. ([\#13974](#13974))
- Linkify urls in config documentation. ([\#14003](#14003))

Deprecations and Removals
-------------------------

- Remove the `complete_sso_login` method from the Module API which was deprecated in Synapse 1.13.0. ([\#13843](#13843))
- Announce that legacy metric names are deprecated, will be turned off by default in Synapse v1.71.0 and removed altogether in Synapse v1.73.0. See the upgrade notes for more information. ([\#14024](#14024))

Internal Changes
----------------

- Speed up creation of DM rooms. ([\#13487](#13487), [\#13800](#13800))
- Port push rules to using Rust. ([\#13768](#13768), [\#13838](#13838), [\#13889](#13889))
- Optimise get rooms for user calls. Contributed by Nick @ Beeper (@Fizzadar). ([\#13787](#13787))
- Update the script which makes full schema dumps. ([\#13792](#13792))
- Use shared methods for cache invalidation when persisting events, remove duplicate codepaths. Contributed by Nick @ Beeper (@Fizzadar). ([\#13796](#13796))
- Improve the `synapse.api.auth.Auth` mock used in unit tests. ([\#13809](#13809))
- Faster Remote Room Joins: tell remote homeservers that we are unable to authorise them if they query a room which has partial state on our server. ([\#13823](#13823))
- Carry IdP Session IDs through user-mapping sessions. ([\#13839](#13839))
- Fix the release script not publishing binary wheels. ([\#13850](#13850))
- Raise issue if complement fails with latest deps. ([\#13859](#13859))
- Correct the comments in the complement dockerfile. ([\#13867](#13867))
- Create a new snapshot of the database schema. ([\#13873](#13873))
- Faster room joins: Send device list updates to most servers in rooms with partial state. ([\#13874](#13874), [\#14013](#14013))
- Add comments to the Prometheus recording rules to make it clear which set of rules you need for Grafana or Prometheus Console. ([\#13876](#13876))
- Only pull relevant backfill points from the database based on the current depth and limit (instead of all) every time we want to `/backfill`. ([\#13879](#13879))
- Faster room joins: Avoid waiting for full state when processing `/keys/changes` requests. ([\#13888](#13888))
- Improve backfill robustness by trying more servers when we get a `4xx` error back. ([\#13890](#13890))
- Fix mypy errors with canonicaljson 1.6.3. ([\#13905](#13905))
- Faster remote room joins: correctly handle remote device list updates during a partial join. ([\#13913](#13913))
- Complement image: propagate SIGTERM to all workers. ([\#13914](#13914))
- Update an innaccurate comment in Synapse's upsert database helper. ([\#13924](#13924))
- Update mypy (0.950 -> 0.981) and mypy-zope (0.3.7 -> 0.3.11). ([\#13925](#13925), [\#13993](#13993))
- Use dedicated `get_local_users_in_room(room_id)` function to find local users when calculating users to copy over during a room upgrade. ([\#13960](#13960))
- Refactor language in user directory `_track_user_joined_room` code to make it more clear that we use both local and remote users. ([\#13966](#13966))
- Revert catch-all exceptions being recorded as event pull attempt failures (only handle what we know about). ([\#13969](#13969))
- Speed up calculating push actions in large rooms. ([\#13973](#13973), [\#13992](#13992))
- Enable update notifications from Github's dependabot. ([\#13976](#13976))
- Prototype a workflow to automatically add changelogs to dependabot PRs. ([\#13998](#13998), [\#14011](#14011), [\#14017](#14017), [\#14021](#14021), [\#14027](#14027))
- Fix type annotations to be compatible with new annotations in development versions of twisted. ([\#14012](#14012))
- Clear out stale entries in `event_push_actions_staging` table. ([\#14020](#14020))
- Bump versions of GitHub actions. ([\#13978](#13978), [\#13979](#13979), [\#13980](#13980), [\#13982](#13982), [\#14015](#14015), [\#14019](#14019), [\#14022](#14022), [\#14023](#14023))
Fizzadar added a commit to beeper/synapse-legacy-fork that referenced this pull request Oct 18, 2022
@Fizzadar
Merge tag 'v1.69.0' into merge-1.69.0
a5616fb 
NOTE: this is absolutely *not* safe for Beeper usage as-is. I have merged
all of the Python code in but all our customizations to the base rules
and push rule evaluator are not yet present in the new Rust module. This
will fail tests as-is and future commits will re-apply our changes in
Rust.

Synapse 1.69.0 (2022-10-17)
===========================

Please note that legacy Prometheus metric names are now deprecated and will be removed in Synapse 1.73.0.
Server administrators should update their dashboards and alerting rules to avoid using the deprecated metric names.
See the [upgrade notes](https://matrix-org.github.io/synapse/v1.69/upgrade.html#upgrading-to-v1690) for more details.

No significant changes since 1.69.0rc4.

Synapse 1.69.0rc4 (2022-10-14)
==============================

Bugfixes
--------

- Fix poor performance of the `event_push_backfill_thread_id` background update, which was introduced in Synapse 1.68.0rc1. ([\matrix-org#14172](matrix-org#14172), [\matrix-org#14181](matrix-org#14181))

Updates to the Docker image
---------------------------

- Fix docker build OOMing in CI for arm64 builds. ([\matrix-org#14173](matrix-org#14173))

Synapse 1.69.0rc3 (2022-10-12)
==============================

Bugfixes
--------

- Fix an issue with Docker images causing the Rust dependencies to not be pinned correctly. Introduced in v1.68.0 ([\matrix-org#14129](matrix-org#14129))
- Fix a bug introduced in Synapse 1.69.0rc1 which would cause registration replication requests to fail if the worker sending the request is not running Synapse 1.69. ([\matrix-org#14135](matrix-org#14135))
- Fix error in background update when rotating existing notifications. Introduced in v1.69.0rc2. ([\matrix-org#14138](matrix-org#14138))

Internal Changes
----------------

- Rename the `url_preview` extra to `url-preview`, for compatability with poetry-core 1.3.0 and [PEP 685](https://peps.python.org/pep-0685/). From-source installations using this extra will need to install using the new name. ([\matrix-org#14085](matrix-org#14085))

Synapse 1.69.0rc2 (2022-10-06)
==============================

Deprecations and Removals
-------------------------

- Deprecate the `generate_short_term_login_token` method in favor of an async `create_login_token` method in the Module API. ([\matrix-org#13842](matrix-org#13842))

Internal Changes
----------------

- Ensure Synapse v1.69 works with upcoming database changes in v1.70. ([\matrix-org#14045](matrix-org#14045))
- Fix a bug introduced in Synapse v1.68.0 where messages could not be sent in rooms with non-integer `notifications` power level. ([\matrix-org#14073](matrix-org#14073))
- Temporarily pin build-system requirements to workaround an incompatibility with poetry-core 1.3.0. This will be reverted before the v1.69.0 release proper, see [\matrix-org#14079](matrix-org#14079). ([\matrix-org#14080](matrix-org#14080))

Synapse 1.69.0rc1 (2022-10-04)
==============================

Features
--------

- Allow application services to set the `origin_server_ts` of a state event by providing the query parameter `ts` in [`PUT /_matrix/client/r0/rooms/{roomId}/state/{eventType}/{stateKey}`](https://spec.matrix.org/v1.4/client-server-api/#put_matrixclientv3roomsroomidstateeventtypestatekey), per [MSC3316](matrix-org/matrix-spec-proposals#3316). Contributed by @lukasdenk. ([\matrix-org#11866](matrix-org#11866))
- Allow server admins to require a manual approval process before new accounts can be used (using [MSC3866](matrix-org/matrix-spec-proposals#3866)). ([\matrix-org#13556](matrix-org#13556))
- Exponentially backoff from backfilling the same event over and over. ([\matrix-org#13635](matrix-org#13635), [\matrix-org#13936](matrix-org#13936))
- Add cache invalidation across workers to module API. ([\matrix-org#13667](matrix-org#13667), [\matrix-org#13947](matrix-org#13947))
- Experimental implementation of [MSC3882](matrix-org/matrix-spec-proposals#3882) to allow an existing device/session to generate a login token for use on a new device/session. ([\matrix-org#13722](matrix-org#13722), [\matrix-org#13868](matrix-org#13868))
- Experimental support for thread-specific receipts ([MSC3771](matrix-org/matrix-spec-proposals#3771)). ([\matrix-org#13782](matrix-org#13782), [\matrix-org#13893](matrix-org#13893), [\matrix-org#13932](matrix-org#13932), [\matrix-org#13937](matrix-org#13937), [\matrix-org#13939](matrix-org#13939))
- Add experimental support for [MSC3881: Remotely toggle push notifications for another client](matrix-org/matrix-spec-proposals#3881). ([\matrix-org#13799](matrix-org#13799), [\matrix-org#13831](matrix-org#13831), [\matrix-org#13860](matrix-org#13860))
- Keep track when an event pulled over federation fails its signature check so we can intelligently back-off in the future. ([\matrix-org#13815](matrix-org#13815))
- Improve validation for the unspecced, internal-only `_matrix/client/unstable/add_threepid/msisdn/submit_token` endpoint. ([\matrix-org#13832](matrix-org#13832))
- Faster remote room joins: record _when_ we first partial-join to a room. ([\matrix-org#13892](matrix-org#13892))
- Support a `dir` parameter on the `/relations` endpoint per [MSC3715](matrix-org/matrix-spec-proposals#3715). ([\matrix-org#13920](matrix-org#13920))
- Ask mail servers receiving emails from Synapse to not send automatic replies (e.g. out-of-office responses). ([\matrix-org#13957](matrix-org#13957))

Bugfixes
--------

- Send push notifications for invites received over federation. ([\matrix-org#13719](matrix-org#13719), [\matrix-org#14014](matrix-org#14014))
- Fix a long-standing bug where typing events would be accepted from remote servers not present in a room. Also fix a bug where incoming typing events would cause other incoming events to get stuck during a fast join. ([\matrix-org#13830](matrix-org#13830))
- Fix a bug introduced in Synapse v1.53.0 where the experimental implementation of [MSC3715](matrix-org/matrix-spec-proposals#3715) would give incorrect results when paginating forward. ([\matrix-org#13840](matrix-org#13840))
- Fix access token leak to logs from proxy agent. ([\matrix-org#13855](matrix-org#13855))
- Fix `have_seen_event` cache not being invalidated after we persist an event which causes inefficiency effects like extra `/state` federation calls. ([\matrix-org#13863](matrix-org#13863))
- Faster room joins: Fix a bug introduced in 1.66.0 where an error would be logged when syncing after joining a room. ([\matrix-org#13872](matrix-org#13872))
- Fix a bug introduced in 1.66.0 where some required fields in the pushrules sent to clients were not present anymore. Contributed by Nico. ([\matrix-org#13904](matrix-org#13904))
- Fix packaging to include `Cargo.lock` in `sdist`. ([\matrix-org#13909](matrix-org#13909))
- Fix a long-standing bug where device updates could cause delays sending out to-device messages over federation. ([\matrix-org#13922](matrix-org#13922))
- Fix a bug introduced in v1.68.0 where Synapse would require `setuptools_rust` at runtime, even though the package is only required at build time. ([\matrix-org#13952](matrix-org#13952))
- Fix a long-standing bug where `POST /_matrix/client/v3/keys/query` requests could result in excessively large SQL queries. ([\matrix-org#13956](matrix-org#13956))
- Fix a performance regression in the `get_users_in_room` database query. Introduced in v1.67.0. ([\matrix-org#13972](matrix-org#13972))
- Fix a bug introduced in v1.68.0 bug where Rust extension wasn't built in `release` mode when using `poetry install`. ([\matrix-org#14009](matrix-org#14009))
- Do not return an unspecified `original_event` field when using the stable `/relations` endpoint. Introduced in Synapse v1.57.0. ([\matrix-org#14025](matrix-org#14025))
- Correctly handle a race with device lists when a remote user leaves during a partial join. ([\matrix-org#13885](matrix-org#13885))
- Correctly handle sending local device list updates to remote servers during a partial join. ([\matrix-org#13934](matrix-org#13934))

Improved Documentation
----------------------

- Add `worker_main_http_uri` for the worker generator bash script. ([\matrix-org#13772](matrix-org#13772))
- Update URL for the NixOS module for Synapse. ([\matrix-org#13818](matrix-org#13818))
- Fix a mistake in sso_mapping_providers.md: `map_user_attributes` is expected to return `display_name`, not `displayname`. ([\matrix-org#13836](matrix-org#13836))
- Fix a cross-link from the registration admin API to the `registration_shared_secret` configuration documentation. ([\matrix-org#13870](matrix-org#13870))
- Update the man page for the `hash_password` script to correct the default number of bcrypt rounds performed. ([\matrix-org#13911](matrix-org#13911), [\matrix-org#13930](matrix-org#13930))
- Emphasize the right reasons when to use `(room_id, event_id)` in a database schema. ([\matrix-org#13915](matrix-org#13915))
- Add instruction to contributing guide for running unit tests in parallel. Contributed by @ashfame. ([\matrix-org#13928](matrix-org#13928))
- Clarify that the `auto_join_rooms` config option can also be used with Space aliases. ([\matrix-org#13931](matrix-org#13931))
- Add some cross references to worker documentation. ([\matrix-org#13974](matrix-org#13974))
- Linkify urls in config documentation. ([\matrix-org#14003](matrix-org#14003))

Deprecations and Removals
-------------------------

- Remove the `complete_sso_login` method from the Module API which was deprecated in Synapse 1.13.0. ([\matrix-org#13843](matrix-org#13843))
- Announce that legacy metric names are deprecated, will be turned off by default in Synapse v1.71.0 and removed altogether in Synapse v1.73.0. See the upgrade notes for more information. ([\matrix-org#14024](matrix-org#14024))

Internal Changes
----------------

- Speed up creation of DM rooms. ([\matrix-org#13487](matrix-org#13487), [\matrix-org#13800](matrix-org#13800))
- Port push rules to using Rust. ([\matrix-org#13768](matrix-org#13768), [\matrix-org#13838](matrix-org#13838), [\matrix-org#13889](matrix-org#13889))
- Optimise get rooms for user calls. Contributed by Nick @ Beeper (@Fizzadar). ([\matrix-org#13787](matrix-org#13787))
- Update the script which makes full schema dumps. ([\matrix-org#13792](matrix-org#13792))
- Use shared methods for cache invalidation when persisting events, remove duplicate codepaths. Contributed by Nick @ Beeper (@Fizzadar). ([\matrix-org#13796](matrix-org#13796))
- Improve the `synapse.api.auth.Auth` mock used in unit tests. ([\matrix-org#13809](matrix-org#13809))
- Faster Remote Room Joins: tell remote homeservers that we are unable to authorise them if they query a room which has partial state on our server. ([\matrix-org#13823](matrix-org#13823))
- Carry IdP Session IDs through user-mapping sessions. ([\matrix-org#13839](matrix-org#13839))
- Fix the release script not publishing binary wheels. ([\matrix-org#13850](matrix-org#13850))
- Raise issue if complement fails with latest deps. ([\matrix-org#13859](matrix-org#13859))
- Correct the comments in the complement dockerfile. ([\matrix-org#13867](matrix-org#13867))
- Create a new snapshot of the database schema. ([\matrix-org#13873](matrix-org#13873))
- Faster room joins: Send device list updates to most servers in rooms with partial state. ([\matrix-org#13874](matrix-org#13874), [\matrix-org#14013](matrix-org#14013))
- Add comments to the Prometheus recording rules to make it clear which set of rules you need for Grafana or Prometheus Console. ([\matrix-org#13876](matrix-org#13876))
- Only pull relevant backfill points from the database based on the current depth and limit (instead of all) every time we want to `/backfill`. ([\matrix-org#13879](matrix-org#13879))
- Faster room joins: Avoid waiting for full state when processing `/keys/changes` requests. ([\matrix-org#13888](matrix-org#13888))
- Improve backfill robustness by trying more servers when we get a `4xx` error back. ([\matrix-org#13890](matrix-org#13890))
- Fix mypy errors with canonicaljson 1.6.3. ([\matrix-org#13905](matrix-org#13905))
- Faster remote room joins: correctly handle remote device list updates during a partial join. ([\matrix-org#13913](matrix-org#13913))
- Complement image: propagate SIGTERM to all workers. ([\matrix-org#13914](matrix-org#13914))
- Update an innaccurate comment in Synapse's upsert database helper. ([\matrix-org#13924](matrix-org#13924))
- Update mypy (0.950 -> 0.981) and mypy-zope (0.3.7 -> 0.3.11). ([\matrix-org#13925](matrix-org#13925), [\matrix-org#13993](matrix-org#13993))
- Use dedicated `get_local_users_in_room(room_id)` function to find local users when calculating users to copy over during a room upgrade. ([\matrix-org#13960](matrix-org#13960))
- Refactor language in user directory `_track_user_joined_room` code to make it more clear that we use both local and remote users. ([\matrix-org#13966](matrix-org#13966))
- Revert catch-all exceptions being recorded as event pull attempt failures (only handle what we know about). ([\matrix-org#13969](matrix-org#13969))
- Speed up calculating push actions in large rooms. ([\matrix-org#13973](matrix-org#13973), [\matrix-org#13992](matrix-org#13992))
- Enable update notifications from Github's dependabot. ([\matrix-org#13976](matrix-org#13976))
- Prototype a workflow to automatically add changelogs to dependabot PRs. ([\matrix-org#13998](matrix-org#13998), [\matrix-org#14011](matrix-org#14011), [\matrix-org#14017](matrix-org#14017), [\matrix-org#14021](matrix-org#14021), [\matrix-org#14027](matrix-org#14027))
- Fix type annotations to be compatible with new annotations in development versions of twisted. ([\matrix-org#14012](matrix-org#14012))
- Clear out stale entries in `event_push_actions_staging` table. ([\matrix-org#14020](matrix-org#14020))
- Bump versions of GitHub actions. ([\matrix-org#13978](matrix-org#13978), [\matrix-org#13979](matrix-org#13979), [\matrix-org#13980](matrix-org#13980), [\matrix-org#13982](matrix-org#13982), [\matrix-org#14015](matrix-org#14015), [\matrix-org#14019](matrix-org#14019), [\matrix-org#14022](matrix-org#14022), [\matrix-org#14023](matrix-org#14023))

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# Conflicts:
#	docker/Dockerfile
#	pyproject.toml
#	synapse/_scripts/update_synapse_database.py
#	synapse/handlers/message.py
#	synapse/handlers/receipts.py
#	synapse/logging/context.py
#	synapse/push/baserules.py
#	synapse/push/bulk_push_rule_evaluator.py
#	synapse/push/push_rule_evaluator.py
#	synapse/replication/http/send_event.py
#	synapse/rest/admin/users.py
#	synapse/rest/client/read_marker.py
#	synapse/rest/client/receipts.py
#	synapse/rest/client/room.py
#	synapse/storage/_base.py
#	synapse/storage/databases/main/__init__.py
#	synapse/storage/databases/main/cache.py
#	synapse/storage/databases/main/events.py
#	synapse/storage/databases/main/receipts.py
#	tests/push/test_push_rule_evaluator.py
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