fix: seed nodes configs dispatcher debug

[Enjection]

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[github-actions]

🟢 2025-11-24 01:03:43 UTC The validation of the Pull Request description is successful.

[Copilot]

Pull request overview

This PR adds debugging and observability features to the ConfigsDispatcher component to help diagnose configuration source issues. The changes enable better visibility into how the system was configured (via seed nodes or dynamic config) and provide new diagnostic APIs.

• Added StartupStorageYaml field to track storage configuration from seed nodes
• Introduced new observability events (TEvGetStateRequest, TEvGetStorageYamlRequest) for runtime introspection
• Split unit tests into separate test targets for better organization

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
ydb/core/config/init/init.h	Added StartupStorageYaml field to TConfigsDispatcherInitInfo struct
ydb/core/config/init/init_impl.h	Updated initialization logic to propagate StartupStorageYaml from app config
ydb/core/cms/console/configs_dispatcher_observer.h	New header defining EConfigSource enum and TConfigsDispatcherState struct for observability
ydb/core/cms/console/configs_dispatcher.h	Added new event types for state queries and storage YAML retrieval
ydb/core/cms/console/configs_dispatcher.cpp	Implemented observability handlers, config source detection, and enhanced monitoring page with storage YAML display
ydb/core/cms/console/ya.make	Added new observer header to build and reorganized test targets
ydb/core/cms/console/ut_console/ya.make	Removed dispatcher-specific tests, moved to separate target
ydb/core/cms/console/ut_configs_dispatcher/ya.make	New test target specifically for configs dispatcher tests
ydb/core/cms/console/configs_dispatcher_ut.cpp	Added comprehensive tests for new observability features covering seed nodes, dynamic config, and unknown config sources

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[github-actions]

⚪ 2025-11-24 01:04:11 UTC Pre-commit check linux-x86_64-release-asan for 2b430cc has started.
⚪ 2025-11-24 01:04:28 UTC Artifacts will be uploaded here
⚪ 2025-11-24 01:06:37 UTC ya make is running...
🟡 2025-11-24 02:38:41 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
12733	12545	0	144	28	16

🟢 2025-11-24 02:38:52 UTC Build successful.
🟢 2025-11-24 02:39:16 UTC ydbd size 3.8 GiB changed* by +99.5 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: d14cebe	merge: 2b430cc	diff	diff %
ydbd size	4 109 494 336 Bytes	4 109 596 256 Bytes	+99.5 KiB	+0.002%
ydbd stripped size	1 527 403 056 Bytes	1 527 438 992 Bytes	+35.1 KiB	+0.002%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

⚪ 2025-11-24 01:06:24 UTC Pre-commit check linux-x86_64-relwithdebinfo for 2b430cc has started.
⚪ 2025-11-24 01:06:57 UTC Artifacts will be uploaded here
⚪ 2025-11-24 01:08:55 UTC ya make is running...
🟢 2025-11-24 02:52:49 UTC Tests successful.

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
39699	36827	0	0	2839	33

🟢 2025-11-24 02:53:01 UTC Build successful.
🟢 2025-11-24 02:53:23 UTC ydbd size 2.3 GiB changed* by +62.9 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: d14cebe	merge: 2b430cc	diff	diff %
ydbd size	2 454 898 248 Bytes	2 454 962 608 Bytes	+62.9 KiB	+0.003%
ydbd stripped size	523 165 528 Bytes	523 177 560 Bytes	+11.8 KiB	+0.002%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}