stable-25-3: Positioning between zones if mirroring with gaps

[ydbot]

Cherry-pick:

• PR Positioning between zones if mirroring with gaps #27934

PR was created by cherry-pick workflow run

[github-actions]

⚪ 2025-10-31 19:56:48 UTC Pre-commit check linux-x86_64-release-asan for 7791247 has started.
⚪ 2025-10-31 19:57:02 UTC Artifacts will be uploaded here
⚪ 2025-10-31 20:00:39 UTC ya make is running...
🟡 2025-10-31 22:06:48 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?
15402	14864	0	218	301	19

🟢 2025-10-31 22:08:17 UTC Build successful.
🟢 2025-10-31 22:08:40 UTC ydbd size 3.8 GiB changed* by +9.5 KiB, which is < 100.0 KiB vs stable-25-3: OK

ydbd size dash	stable-25-3: 3c8e457	merge: 7791247	diff	diff %
ydbd size	4 060 087 056 Bytes	4 060 096 816 Bytes	+9.5 KiB	+0.000%
ydbd stripped size	1 513 142 176 Bytes	1 513 144 992 Bytes	+2.8 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]

⚪ 2025-10-31 19:56:48 UTC Pre-commit check linux-x86_64-relwithdebinfo for 7791247 has started.
⚪ 2025-10-31 19:57:03 UTC Artifacts will be uploaded here
⚪ 2025-10-31 20:00:32 UTC ya make is running...
🟡 2025-10-31 21:18:36 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
30708	29392	0	4	1292	20

⚪ 2025-10-31 21:20:59 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-10-31 21:36:48 UTC Tests successful.

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
571 (only retried tests)	554	0	0	0	17

🟢 2025-10-31 21:36:57 UTC Build successful.
🟢 2025-10-31 21:37:12 UTC ydbd size 2.3 GiB changed* by +4.7 KiB, which is < 100.0 KiB vs stable-25-3: OK

ydbd size dash	stable-25-3: 3c8e457	merge: 7791247	diff	diff %
ydbd size	2 439 337 440 Bytes	2 439 342 296 Bytes	+4.7 KiB	+0.000%
ydbd stripped size	522 239 464 Bytes	522 240 424 Bytes	+960 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}

[github-actions]

🟢 2025-10-31 19:58:48 UTC The validation of the Pull Request description is successful.