24-1 Fix B-Tree histograms comparator result overflow

[kunga]

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 11:04:46 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-03-17 11:11:32 UTC Pre-commit check for d85c3b4 has started.
⚪ 2025-03-17 11:14:51 UTC Build linux-x86_64-release-asan is running...
🟢 2025-03-17 12:01:12 UTC Build successful.
⚪ 2025-03-17 12:01:31 UTC Tests are running...
🔴 2025-03-17 14:23:55 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
11695	11576	0	48	30	41

🟢 2025-03-17 14:24:41 UTC ydbd size 5.6 GiB changed* by +39.7 KiB, which is < 100.0 KiB vs stable-24-4: OK

ydbd size dash	stable-24-4: 85b3d16	merge: d85c3b4	diff	diff %
ydbd size	6 027 674 280 Bytes	6 027 714 936 Bytes	+39.7 KiB	+0.001%
ydbd stripped size	1 508 473 088 Bytes	1 508 481 664 Bytes	+8.4 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 11:16:06 UTC Pre-commit check for d85c3b4 has started.
⚪ 2025-03-17 11:19:05 UTC Build linux-x86_64-relwithdebinfo is running...
🟢 2025-03-17 12:19:56 UTC Build successful.
⚪ 2025-03-17 12:20:11 UTC Tests are running...
🔴 2025-03-17 14:16:11 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
40373	35086	0	24	5219	44

🟢 2025-03-17 14:17:10 UTC ydbd size 8.3 GiB changed* by +47.0 KiB, which is < 100.0 KiB vs stable-24-4: OK

ydbd size dash	stable-24-4: 85b3d16	merge: d85c3b4	diff	diff %
ydbd size	8 898 609 496 Bytes	8 898 657 600 Bytes	+47.0 KiB	+0.001%
ydbd stripped size	485 027 272 Bytes	485 030 024 Bytes	+2.7 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}