25-1 Fix B-Tree histograms comparator result overflow

[kungasc]

Changelog entry

Fixes invalid data shards histograms when enable_local_dbbtree_index is enabled (#15235)

Changelog category

• Bugfix

Description for reviewers

Due to wrong cast int compare result to i8, we got a wrong events order

Also adds additional key logs, fixes typo with GetDataSize, adds error log in a case with bad histogram

#15720

[github-actions]

🟢 2025-03-17 10:57:42 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-03-17 11:09:48 UTC Pre-commit check linux-x86_64-release-asan for bbbb342 has started.
⚪ 2025-03-17 11:10:02 UTC Artifacts will be uploaded here
⚪ 2025-03-17 11:13:04 UTC ya make is running...
🟡 2025-03-17 12:50:33 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?
13594	13418	0	114	24	38

⚪ 2025-03-17 12:52:06 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-03-17 13:13:51 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?
222 (only retried tests)	180	0	1	7	34

⚪ 2025-03-17 13:14:03 UTC ya make is running... (failed tests rerun, try 3)
🟢 2025-03-17 13:34:29 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
71 (only retried tests)	35	0	0	2	34

🟢 2025-03-17 13:34:46 UTC Build successful.
🟢 2025-03-17 13:35:16 UTC ydbd size 3.6 GiB changed* by +36.4 KiB, which is < 100.0 KiB vs stable-25-1: OK

ydbd size dash	stable-25-1: 5c53ee8	merge: bbbb342	diff	diff %
ydbd size	3 901 757 536 Bytes	3 901 794 824 Bytes	+36.4 KiB	+0.001%
ydbd stripped size	1 365 470 544 Bytes	1 365 486 160 Bytes	+15.2 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}

[github-actions]

⚪ 2025-03-17 11:15:25 UTC Pre-commit check linux-x86_64-relwithdebinfo for bbbb342 has started.
⚪ 2025-03-17 11:15:39 UTC Artifacts will be uploaded here
⚪ 2025-03-17 11:18:48 UTC ya make is running...
🟡 2025-03-17 12:54:01 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?
27812	25205	0	5	2465	137

⚪ 2025-03-17 12:57:13 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-03-17 13:22:18 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
219 (only retried tests)	85	0	0	2	132

🟢 2025-03-17 13:22:27 UTC Build successful.
🟢 2025-03-17 13:22:47 UTC ydbd size 2.1 GiB changed* by +17.0 KiB, which is < 100.0 KiB vs stable-25-1: OK

ydbd size dash	stable-25-1: 5c53ee8	merge: bbbb342	diff	diff %
ydbd size	2 243 014 368 Bytes	2 243 031 776 Bytes	+17.0 KiB	+0.001%
ydbd stripped size	475 014 648 Bytes	475 017 720 Bytes	+3.0 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}