25-1: follower compatability issues (#15974)

[vporyadke]

Changelog entry

fixes for handling per-dc followers created on older YDB versions #16000

Changelog category

• Bugfix

Description for reviewers

...
backport of #15974

[github-actions]

🟢 2025-05-15 15:52:37 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-05-15 15:54:06 UTC Pre-commit check linux-x86_64-relwithdebinfo for 6be9c25 has started.
⚪ 2025-05-15 15:54:46 UTC Artifacts will be uploaded here
⚪ 2025-05-15 15:59:44 UTC ya make is running...
🟡 2025-05-15 17:04:35 UTC Some tests failed, follow the links below. Going to retry failed tests...

Details

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
19184	17909	0	2	1207	66

⚪ 2025-05-15 17:06:20 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-05-15 17:28:15 UTC Tests successful.

Test history | Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
129 (only retried tests)	67	0	0	0	62

🟢 2025-05-15 17:28:24 UTC Build successful.
🟡 2025-05-15 17:28:54 UTC ydbd size 2.1 GiB changed* by +115.8 KiB, which is >= 100.0 KiB vs stable-25-1: Warning

ydbd size dash	stable-25-1: 7a9a4c6	merge: 6be9c25	diff	diff %
ydbd size	2 249 014 112 Bytes	2 249 132 656 Bytes	+115.8 KiB	+0.005%
ydbd stripped size	475 964 920 Bytes	475 990 104 Bytes	+24.6 KiB	+0.005%

^{*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]

⚪ 2025-05-15 16:01:45 UTC Pre-commit check linux-x86_64-release-asan for 6be9c25 has started.
⚪ 2025-05-15 16:02:20 UTC Artifacts will be uploaded here
⚪ 2025-05-15 16:05:21 UTC ya make is running...
🟡 2025-05-15 17:11:47 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Details

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
12152	11963	0	86	68	35

⚪ 2025-05-15 17:12:51 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-05-15 17:40:01 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Details

Test history | Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
245 (only retried tests)	155	0	9	48	33

⚪ 2025-05-15 17:40:09 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-05-15 17:59:56 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Test history | Ya make output | Test bloat | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
120 (only retried tests)	35	0	8	45	32

🟢 2025-05-15 18:00:04 UTC Build successful.
🟢 2025-05-15 18:00:32 UTC ydbd size 3.6 GiB changed* by +51.9 KiB, which is < 100.0 KiB vs stable-25-1: OK

ydbd size dash	stable-25-1: a3e836e	merge: 6be9c25	diff	diff %
ydbd size	3 912 498 160 Bytes	3 912 551 264 Bytes	+51.9 KiB	+0.001%
ydbd stripped size	1 368 422 768 Bytes	1 368 449 200 Bytes	+25.8 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}