Rename cluster state fetch to cluster diagnostics collect

[Evgenik2]

Changelog entry

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Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

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[github-actions]

⚪ 2025-12-05 15:06:10 UTC Pre-commit check linux-x86_64-relwithdebinfo for bd14303 has started.
⚪ 2025-12-05 15:06:28 UTC Artifacts will be uploaded here
⚪ 2025-12-05 15:08:36 UTC ya make is running...
🟡 2025-12-05 15:49:09 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
4650	4542	0	2	96	10

⚪ 2025-12-05 15:49:17 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-12-05 16:03:08 UTC Tests successful.

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
25 (only retried tests)	17	0	0	0	8

🟢 2025-12-05 16:03:15 UTC Build successful.
🟢 2025-12-05 16:03:32 UTC ydbd size 2.3 GiB changed* by 0 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 1d6c232	merge: bd14303	diff	diff %
ydbd size	2 466 152 008 Bytes	2 466 152 008 Bytes	0 Bytes	0.000%
ydbd stripped size	524 843 136 Bytes	524 843 136 Bytes	0 Bytes	0.000%

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

[ydbot]

Run Extra Tests

Run additional tests for this PR. You can customize:

• Test Size: small, medium, large (default: all)
• Test Targets: any directory path (default: ydb/)
• Sanitizers: ASAN, MSAN, TSAN
• Coredumps: enable for debugging (default: off)
• Additional args: custom ya make arguments

[github-actions]

🟢 2025-12-05 15:08:07 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-12-05 15:08:28 UTC Pre-commit check linux-x86_64-release-asan for bd14303 has started.
⚪ 2025-12-05 15:08:46 UTC Artifacts will be uploaded here
⚪ 2025-12-05 15:10:57 UTC ya make is running...
🟡 2025-12-05 15:44:09 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?
1447	1434	0	8	1	4

🟢 2025-12-05 15:44:15 UTC Build successful.
🟢 2025-12-05 15:44:35 UTC ydbd size 3.8 GiB changed* by -96 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 1d6c232	merge: bd14303	diff	diff %
ydbd size	4 127 809 296 Bytes	4 127 809 200 Bytes	-96 Bytes	-0.000%
ydbd stripped size	1 532 692 760 Bytes	1 532 692 696 Bytes	-64 Bytes	-0.000%

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

[ydbot]

Backport

To backport this PR, click the button next to the target branch and then click "Run workflow" in the Run Actions UI.

Branch	Run
stable-25-2, stable-25-2-1, stable-25-3, stable-25-3-1
stable-25-3, stable-25-3-1
stable-25-3