Forbid external offset commits for MLP consumers

[ubyte]

Changelog entry

...

Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

LOGBROKER-10304

[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]

⚪ 2026-02-27 16:00:43 UTC Pre-commit check linux-x86_64-release-asan for 47c53f1 has started.
⚪ 2026-02-27 16:01:01 UTC Artifacts will be uploaded here
⚪ 2026-02-27 16:03:14 UTC ya make is running...
⚫ 2026-02-27 16:36:38 UTC Check cancelled

[github-actions]

🟢 2026-02-27 16:01:31 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2026-02-27 16:02:14 UTC Pre-commit check linux-x86_64-relwithdebinfo for 47c53f1 has started.

[github-actions]

⚪ 2026-02-27 16:40:29 UTC Pre-commit check linux-x86_64-release-asan for 47c53f1 has started.
⚪ 2026-02-27 16:40:47 UTC Artifacts will be uploaded here
⚪ 2026-02-27 16:42:58 UTC ya make is running...
🟡 2026-02-27 17:52:37 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?
17303	17262	0	27	10	4

🟢 2026-02-27 17:52:47 UTC Build successful.
🟢 2026-02-27 17:53:18 UTC ydbd size 3.9 GiB changed* by +17.5 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: c5cea53	merge: 47c53f1	diff	diff %
ydbd size	4 219 447 936 Bytes	4 219 465 848 Bytes	+17.5 KiB	+0.000%
ydbd stripped size	1 578 534 080 Bytes	1 578 538 304 Bytes	+4.1 KiB	+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}

[github-actions]

⚪ 2026-02-27 16:40:44 UTC Pre-commit check linux-x86_64-relwithdebinfo for 47c53f1 has started.
⚪ 2026-02-27 16:41:02 UTC Artifacts will be uploaded here
⚪ 2026-02-27 16:43:14 UTC ya make is running...
🟡 2026-02-27 18:51:06 UTC Some tests failed, follow the links below. Going to retry failed tests...

Details

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
46462	43003	0	4	3444	11

⚪ 2026-02-27 18:51:23 UTC ya make is running... (failed tests rerun, try 2)
🟢 2026-02-27 18:54:19 UTC Tests successful.

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
163 (only retried tests)	160	0	0	0	3

🟢 2026-02-27 18:54:26 UTC Build successful.
🟢 2026-02-27 18:54:49 UTC ydbd size 2.4 GiB changed* by +10.2 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: c5cea53	merge: 47c53f1	diff	diff %
ydbd size	2 589 200 288 Bytes	2 589 210 744 Bytes	+10.2 KiB	+0.000%
ydbd stripped size	545 241 768 Bytes	545 243 368 Bytes	+1.6 KiB	+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-25-4, stable-25-4-1, stable-26-1, stable-26-1-1
stable-26-1, stable-26-1-1
stable-26-1