Add release notes for v9.1.6 release

docs/release-notes/breaking-changes.md

@@ -12,6 +12,13 @@ If you are migrating from a version prior to version 9.0, you must first upgrade
 
 % ## Next version [elasticsearch-nextversion-breaking-changes]
 
+```{applies_to}
+stack: ga 9.1.6
+```
+## 9.1.6 [elasticsearch-9.1.6-breaking-changes]
+
+There are no breaking changes associated with this release.
+
 ## 9.2.0 [elasticsearch-9.2.0-breaking-changes]
 
 Ingest Node:

docs/release-notes/changelog-bundles/9.1.6.yml

@@ -0,0 +1,95 @@
+version: 9.1.6
+released: false
+generated: 2025-10-22T17:03:50.756198780Z
+changelogs:
+  - pr: 132651
+    summary: Use java8 variant of apm-agent
+    area: Infra/Core
+    type: upgrade
+    issues: []
+  - pr: 135966
+    summary: Ensure queued `AbstractRunnables` are notified when executor stops
+    area: Machine Learning
+    type: bug
+    issues:
+      - 134651
+  - pr: 135994
+    summary: Cardinality Aggregator Throws `UnsupportedOperationException` When Field Type is Vector
+    area: Vector Search
+    type: bug
+    issues: []
+  - pr: 136017
+    summary: Cohere service Model Id field is required
+    area: Machine Learning
+    type: bug
+    issues: []
+  - pr: 136058
+    summary: Configurable HTTP read and connect timeouts for url based SAML metadata resolution
+    area: Security
+    type: bug
+    issues: []
+  - pr: 136119
+    summary: Fix logsdb settings provider mapping filters
+    area: Logs
+    type: bug
+    issues:
+      - 136107
+  - pr: 136279
+    summary: Initialize `TermsEnum` eagerly
+    area: Search
+    type: bug
+    issues: []
+  - pr: 136315
+    summary: Store full path in `_ignored` when ignoring dynamic array field
+    area: Mapping
+    type: bug
+    issues: []
+  - pr: 136492
+    summary: Make `ResolveUnionTypes` rule stateless
+    area: ES|QL
+    type: bug
+    issues: []
+  - pr: 136501
+    summary: "Reindex-from-remote: Validate basic auth params"
+    area: Indices APIs
+    type: bug
+    issues:
+      - 135925
+  - pr: 136577
+    summary: Clean up inference indices on failed endpoint creation
+    area: Machine Learning
+    type: bug
+    issues:
+      - 123726
+  - pr: 136625
+    summary: Optimize Index Permission Automatons for Has Privileges
+    area: Security
+    type: bug
+    issues: []
+  - pr: 136664
+    summary: Drop project-id from threadcontext for CCS
+    area: Authorization
+    type: bug
+    issues: []
+  - pr: 136684
+    summary: Lazy compute and cache `grantsAll` per privilege
+    area: Authorization
+    type: enhancement
+    issues: []
+  - pr: 136751
+    summary: Adjust jinaai rerank response parser to handle document field as string or object
+    area: Machine Learning
+    type: bug
+    issues: []
+  - pr: 136757
+    summary: Allow dynamic updates to frequency
+    area: Transform
+    type: bug
+    issues:
+      - 133321
+  - pr: 136769
+    summary: Release cluster state
+    area: Machine Learning
+    type: bug
+    issues:
+      - 123243

docs/release-notes/deprecations.md

@@ -16,6 +16,13 @@ To give you insight into what deprecated features you’re using, {{es}}:
 
 % ## Next version [elasticsearch-nextversion-deprecations]
 
+```{applies_to}
+stack: ga 9.1.6
+```
+## 9.1.6 [elasticsearch-9.1.6-deprecations]
+
+There are no deprecations associated with this release.
+
 ## 9.2.0 [elasticsearch-9.2.0-deprecations]
 
 Cluster Coordination:

docs/release-notes/index.md

@@ -20,6 +20,58 @@ To check for security updates, go to [Security announcements for the Elastic sta
 % ### Fixes [elasticsearch-next-fixes]
 % *
 
+## 9.1.6 [elasticsearch-9.1.6-release-notes]
+```{applies_to}
+stack: ga 9.1.6
+```
+
+### Features and enhancements [elasticsearch-9.1.6-features-enhancements]
+
+Authorization:
+* Lazy compute and cache `grantsAll` per privilege [#136684](https://github.com/elastic/elasticsearch/pull/136684)
+
+Infra/Core:
+* Use java8 variant of apm-agent [#132651](https://github.com/elastic/elasticsearch/pull/132651)
+
+
+### Fixes [elasticsearch-9.1.6-fixes]
+
+Authorization:
+* Drop project-id from threadcontext for CCS [#136664](https://github.com/elastic/elasticsearch/pull/136664)
+
+ES|QL:
+* Make `ResolveUnionTypes` rule stateless [#136492](https://github.com/elastic/elasticsearch/pull/136492)
+
+Indices APIs:
+* Reindex-from-remote: Validate basic auth params [#136501](https://github.com/elastic/elasticsearch/pull/136501) (issue: [#135925](https://github.com/elastic/elasticsearch/issues/135925))
+
+Logs:
+* Fix logsdb settings provider mapping filters [#136119](https://github.com/elastic/elasticsearch/pull/136119) (issue: [#136107](https://github.com/elastic/elasticsearch/issues/136107))
+
+Machine Learning:
+* Adjust jinaai rerank response parser to handle document field as string or object [#136751](https://github.com/elastic/elasticsearch/pull/136751)
+* Clean up inference indices on failed endpoint creation [#136577](https://github.com/elastic/elasticsearch/pull/136577) (issue: [#123726](https://github.com/elastic/elasticsearch/issues/123726))
+* Cohere service Model Id field is required [#136017](https://github.com/elastic/elasticsearch/pull/136017)
+* Ensure queued `AbstractRunnables` are notified when executor stops [#135966](https://github.com/elastic/elasticsearch/pull/135966) (issue: [#134651](https://github.com/elastic/elasticsearch/issues/134651))
+* Release cluster state [#136769](https://github.com/elastic/elasticsearch/pull/136769) (issue: [#123243](https://github.com/elastic/elasticsearch/issues/123243))
+
+Mapping:
+* Store full path in `_ignored` when ignoring dynamic array field [#136315](https://github.com/elastic/elasticsearch/pull/136315)
+
+Search:
+* Initialize `TermsEnum` eagerly [#136279](https://github.com/elastic/elasticsearch/pull/136279)
+
+Security:
+* Configurable HTTP read and connect timeouts for url based SAML metadata resolution [#136058](https://github.com/elastic/elasticsearch/pull/136058)
+* Optimize Index Permission Automatons for Has Privileges [#136625](https://github.com/elastic/elasticsearch/pull/136625)
+
+Transform:
+* Allow dynamic updates to frequency [#136757](https://github.com/elastic/elasticsearch/pull/136757) (issue: [#133321](https://github.com/elastic/elasticsearch/issues/133321))
+
+Vector Search:
+* Cardinality Aggregator Throws `UnsupportedOperationException` When Field Type is Vector [#135994](https://github.com/elastic/elasticsearch/pull/135994)
+
+
 ## 9.2.0 [elasticsearch-9.2.0-release-notes]
 
 ### Highlights [elasticsearch-9.2.0-highlights]
@@ -491,8 +543,6 @@ Vector Search:
 * Fix _inference_fields handling on old indices [#136312](https://github.com/elastic/elasticsearch/pull/136312) (issue: [#136130](https://github.com/elastic/elasticsearch/issues/136130))
 * Have top level knn searches tracked in query stats [#132548](https://github.com/elastic/elasticsearch/pull/132548)
 
-
-
 ## 9.0.8 [elasticsearch-9.0.8-release-notes]
 
 ### Highlights [elasticsearch-9.0.8-highlights]