Support bidirectional assimilation

[alexvru]

Changelog entry

Support bidirectional assimilation

Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

This patch allows running assimilation in reverse order for online VDisk with read-write support to make assimilation predictable. Intended to use for syncing piles in Bridge mode.

[github-actions]

🟢 2025-06-23 08:25:13 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-06-23 08:27:08 UTC Pre-commit check linux-x86_64-relwithdebinfo for 9e55b07 has started.
⚪ 2025-06-23 08:27:19 UTC Artifacts will be uploaded here
⚪ 2025-06-23 08:31:06 UTC ya make is running...
🟡 2025-06-23 10:23:56 UTC Some tests failed, follow the links below. Going to retry failed tests...

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
38269	35542	0	3	2676	48

⚪ 2025-06-23 10:27:28 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-06-23 10:37:45 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
763 (only retried tests)	731	0	0	0	32

🟢 2025-06-23 10:37:58 UTC Build successful.
🟡 2025-06-23 10:38:18 UTC ydbd size 2.2 GiB changed* by +169.6 KiB, which is >= 100.0 KiB vs main: Warning

ydbd size dash	main: e45a3f0	merge: 9e55b07	diff	diff %
ydbd size	2 379 036 816 Bytes	2 379 210 520 Bytes	+169.6 KiB	+0.007%
ydbd stripped size	498 376 520 Bytes	498 403 784 Bytes	+26.6 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]

⚪ 2025-06-23 08:27:23 UTC Pre-commit check linux-x86_64-release-asan for 9e55b07 has started.
⚪ 2025-06-23 08:27:36 UTC Artifacts will be uploaded here
⚪ 2025-06-23 08:31:18 UTC ya make is running...
🟡 2025-06-23 10:55:31 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
15971	15609	0	88	248	26

⚪ 2025-06-23 10:56:56 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-06-23 11:33:58 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
1739 (only retried tests)	1481	0	52	181	25

⚪ 2025-06-23 11:34:17 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-06-23 12:04:56 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?
1448 (only retried tests)	1205	0	47	169	27

🟢 2025-06-23 12:05:12 UTC Build successful.
🟡 2025-06-23 12:05:47 UTC ydbd size 3.9 GiB changed* by +233.4 KiB, which is >= 100.0 KiB vs main: Warning

ydbd size dash	main: e45a3f0	merge: 9e55b07	diff	diff %
ydbd size	4 185 311 944 Bytes	4 185 550 896 Bytes	+233.4 KiB	+0.006%
ydbd stripped size	1 451 045 560 Bytes	1 451 086 584 Bytes	+40.1 KiB	+0.003%

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