Stable-25-1 Fix snapshots

[nikvas0]

Changelog entry

Fixes #20709. Need to acquire snapshot for dependant reads even in RW transaction.

Changelog category

• Bugfix

Description for reviewers

#20652

[github-actions]

⚪ 2025-07-07 10:49:27 UTC Pre-commit check linux-x86_64-relwithdebinfo for f5d3d62 has started.
⚪ 2025-07-07 10:49:39 UTC Artifacts will be uploaded here
⚪ 2025-07-07 10:52:30 UTC ya make is running...
🟡 2025-07-07 11:55:31 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?
19576	18301	0	5	1226	44

⚪ 2025-07-07 11:57:16 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-07-07 12:17:15 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
92 (only retried tests)	51	0	0	0	41

🟢 2025-07-07 12:17:22 UTC Build successful.
🟢 2025-07-07 12:17:41 UTC ydbd size 2.1 GiB changed* by +3.0 KiB, which is < 100.0 KiB vs stable-25-1: OK

ydbd size dash	stable-25-1: 243a4e6	merge: f5d3d62	diff	diff %
ydbd size	2 303 291 400 Bytes	2 303 294 520 Bytes	+3.0 KiB	+0.000%
ydbd stripped size	484 379 008 Bytes	484 379 968 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]

⚪ 2025-07-07 10:49:27 UTC Pre-commit check linux-x86_64-release-asan for f5d3d62 has started.
⚪ 2025-07-07 10:49:41 UTC Artifacts will be uploaded here
⚪ 2025-07-07 10:52:34 UTC ya make is running...
🟡 2025-07-07 12:08:51 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?
12453	12343	0	41	31	38

⚪ 2025-07-07 12:09:57 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-07-07 12:30:43 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?
157 (only retried tests)	111	0	5	5	36

⚪ 2025-07-07 12:30:52 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-07-07 12:50:42 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?
76 (only retried tests)	40	0	2	0	34

🟢 2025-07-07 12:50:50 UTC Build successful.
🟢 2025-07-07 12:51:22 UTC ydbd size 3.7 GiB changed* by +5.6 KiB, which is < 100.0 KiB vs stable-25-1: OK

ydbd size dash	stable-25-1: 243a4e6	merge: f5d3d62	diff	diff %
ydbd size	4 009 781 048 Bytes	4 009 786 808 Bytes	+5.6 KiB	+0.000%
ydbd stripped size	1 399 539 192 Bytes	1 399 541 048 Bytes	+1.8 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]

🟢 2025-07-07 11:20:39 UTC The validation of the Pull Request description is successful.