Reject operations in column shards by probability

[neyrox]

Changelog entry

RejectProbability for ColumnsShard support

#21936

Changelog category

• Performance improvement

Description for reviewers

WIP

[github-actions]

🟢 2025-10-13 12:27:00 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-10-13 12:38:51 UTC Pre-commit check linux-x86_64-relwithdebinfo for d405b18 has started.
⚪ 2025-10-13 12:39:04 UTC Artifacts will be uploaded here
⚪ 2025-10-13 12:42:40 UTC ya make is running...

[github-actions]

⚪ 2025-10-13 12:50:19 UTC Pre-commit check linux-x86_64-release-asan for d405b18 has started.
⚪ 2025-10-13 12:50:33 UTC Artifacts will be uploaded here
⚪ 2025-10-13 12:54:10 UTC ya make is running...
🟡 2025-10-13 14:56:07 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?
15469	15005	0	157	288	19

🟢 2025-10-13 14:56:12 UTC Build successful.
🟢 2025-10-13 14:56:35 UTC ydbd size 3.7 GiB changed* by +14.8 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: ff2b01d	merge: d405b18	diff	diff %
ydbd size	4 025 781 648 Bytes	4 025 796 840 Bytes	+14.8 KiB	+0.000%
ydbd stripped size	1 495 229 728 Bytes	1 495 237 472 Bytes	+7.6 KiB	+0.001%

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