[NOT FOR MERGE]Flush preaggregation vased on rows count

[lll-phill-lll]

Changelog entry

...

Changelog category

• New feature
• Experimental feature
• Improvement
• Performance improvement
• Bugfix
• Backward incompatible change
• Documentation (changelog entry is not required)
• Not for changelog (changelog entry is not required)

Additional information

...

[github-actions]

⚪ 2025-01-21 18:06:59 UTC Pre-commit check linux-x86_64-release-asan for 9d2127e has started.
⚪ 2025-01-21 18:07:11 UTC Artifacts will be uploaded here
⚪ 2025-01-21 18:10:02 UTC ya make is running...
🟡 2025-01-21 19:05:57 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?
11558	11473	0	25	33	27

⚪ 2025-01-21 19:07:09 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-01-21 19:19:11 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?
118 (only retried tests)	65	0	6	22	25

⚪ 2025-01-21 19:19:19 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-01-21 19:30:59 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?
77 (only retried tests)	47	0	4	1	25

🟢 2025-01-21 19:31:06 UTC Build successful.
🟢 2025-01-21 19:31:52 UTC ydbd size 3.6 GiB changed* by +8.3 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 276c163	merge: 9d2127e	diff	diff %
ydbd size	3 854 166 584 Bytes	3 854 175 048 Bytes	+8.3 KiB	+0.000%
ydbd stripped size	1 346 599 632 Bytes	1 346 602 576 Bytes	+2.9 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]

⚪ 2025-01-21 18:07:06 UTC Pre-commit check linux-x86_64-relwithdebinfo for 9d2127e has started.
⚪ 2025-01-21 18:07:11 UTC Artifacts will be uploaded here
⚪ 2025-01-21 18:10:07 UTC ya make is running...
🟡 2025-01-21 19:04:43 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?
25797	23290	0	3	2381	123

⚪ 2025-01-21 19:06:58 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-01-21 19:19:04 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
182 (only retried tests)	61	0	0	0	121

🟢 2025-01-21 19:19:10 UTC Build successful.
🟡 2025-01-21 19:19:29 UTC ydbd size 2.1 GiB changed* by +326.9 KiB, which is >= 100.0 KiB vs main: Warning

ydbd size dash	main: 805caa2	merge: 9d2127e	diff	diff %
ydbd size	2 216 957 064 Bytes	2 217 291 808 Bytes	+326.9 KiB	+0.015%
ydbd stripped size	468 691 344 Bytes	468 763 024 Bytes	+70.0 KiB	+0.015%

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