optimized SST index for blobs (index and iterator part)

[alexd65536]

Changelog category

• Not for changelog (changelog entry is not required)

[github-actions]

🟢 2025-04-09 12:39:25 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-04-09 12:40:54 UTC Pre-commit check linux-x86_64-relwithdebinfo for 0bd26eb has started.
⚪ 2025-04-09 12:41:10 UTC Artifacts will be uploaded here
⚪ 2025-04-09 12:44:02 UTC ya make is running...
🟡 2025-04-09 13:49:51 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?
20229	18858	0	4	1247	120

⚪ 2025-04-09 13:51:36 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-04-09 14:03:47 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
176 (only retried tests)	70	0	0	0	106

🟢 2025-04-09 14:03:56 UTC Build successful.
🟡 2025-04-09 14:04:17 UTC ydbd size 2.2 GiB changed* by +101.5 KiB, which is >= 100.0 KiB vs main: Warning

ydbd size dash	main: 651a677	merge: 0bd26eb	diff	diff %
ydbd size	2 357 506 656 Bytes	2 357 610 624 Bytes	+101.5 KiB	+0.004%
ydbd stripped size	492 796 384 Bytes	492 802 720 Bytes	+6.2 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]

⚪ 2025-04-09 12:46:11 UTC Pre-commit check linux-x86_64-release-asan for 0bd26eb has started.
⚪ 2025-04-09 12:46:40 UTC Artifacts will be uploaded here
⚪ 2025-04-09 12:50:14 UTC ya make is running...
🟡 2025-04-09 14:08:32 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?
12641	12493	0	75	37	36

⚪ 2025-04-09 14:09:38 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-04-09 14:23:22 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?
205 (only retried tests)	130	0	38	3	34

⚪ 2025-04-09 14:23:31 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-04-09 14:35:42 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?
109 (only retried tests)	40	0	35	1	33

🟢 2025-04-09 14:35:49 UTC Build successful.
🟡 2025-04-09 14:36:20 UTC ydbd size 3.9 GiB changed* by +228.3 KiB, which is >= 100.0 KiB vs main: Warning

ydbd size dash	main: 651a677	merge: 0bd26eb	diff	diff %
ydbd size	4 136 337 160 Bytes	4 136 570 952 Bytes	+228.3 KiB	+0.006%
ydbd stripped size	1 428 684 488 Bytes	1 428 728 456 Bytes	+42.9 KiB	+0.003%

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