Fix LastOffset bug in PQ

[FloatingCrowbar]

Changelog entry

Fix the bug in LastOffset handling in PQ

Changelog category

• Bugfix

Description for reviewers

#28710
#28415

[github-actions]

⚪ 2025-11-11 22:43:37 UTC Pre-commit check linux-x86_64-relwithdebinfo for 20661a6 has started.
⚪ 2025-11-11 22:43:52 UTC Artifacts will be uploaded here
⚪ 2025-11-11 22:47:24 UTC ya make is running...
🟡 2025-11-12 00:09:29 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
30789	29466	0	10	1292	21

⚪ 2025-11-12 00:11:54 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-11-12 00:27:21 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
566 (only retried tests)	548	0	1	0	17

⚪ 2025-11-12 00:27:32 UTC ya make is running... (failed tests rerun, try 3)
🔴 2025-11-12 00:43:47 UTC Some tests failed, follow the links below.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
542 (only retried tests)	520	0	3	1	18

🟢 2025-11-12 00:43:56 UTC Build successful.
🟢 2025-11-12 00:44:10 UTC ydbd size 2.3 GiB changed* by -128 Bytes, which is <= 0 Bytes vs stable-25-3: OK

ydbd size dash	stable-25-3: ab4b422	merge: 20661a6	diff	diff %
ydbd size	2 440 539 032 Bytes	2 440 538 904 Bytes	-128 Bytes	-0.000%
ydbd stripped size	522 431 432 Bytes	522 431 368 Bytes	-64 Bytes	-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]

🟢 2025-11-12 09:38:43 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-11-11 19:24:54 UTC Pre-commit check linux-x86_64-release-asan for 20661a6 has started.
⚪ 2025-11-11 19:25:12 UTC Artifacts will be uploaded here
⚪ 2025-11-11 19:28:48 UTC ya make is running...
🟡 2025-11-11 21:43:20 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?
15465	14855	0	270	323	17

🟢 2025-11-11 21:45:07 UTC Build successful.
🟢 2025-11-11 21:45:32 UTC ydbd size 3.8 GiB changed* by +208 Bytes, which is < 100.0 KiB vs stable-25-3: OK

ydbd size dash	stable-25-3: ab4b422	merge: 20661a6	diff	diff %
ydbd size	4 061 986 896 Bytes	4 061 987 104 Bytes	+208 Bytes	+0.000%
ydbd stripped size	1 513 687 264 Bytes	1 513 687 200 Bytes	-64 Bytes	-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]

⚪ 2025-11-12 06:39:45 UTC Pre-commit check linux-x86_64-relwithdebinfo for 118046d has started.
⚪ 2025-11-12 06:40:00 UTC Artifacts will be uploaded here
⚪ 2025-11-12 06:43:38 UTC ya make is running...
🟡 2025-11-12 08:05:21 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
30962	29643	0	9	1292	18

⚪ 2025-11-12 08:07:52 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-11-12 08:26:58 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
680 (only retried tests)	660	0	1	1	18

⚪ 2025-11-12 08:27:08 UTC ya make is running... (failed tests rerun, try 3)
🟢 2025-11-12 08:42:49 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
537 (only retried tests)	519	0	0	0	18

🟢 2025-11-12 08:42:57 UTC Build successful.
🟢 2025-11-12 08:43:16 UTC ydbd size 2.3 GiB changed* by -144 Bytes, which is <= 0 Bytes vs stable-25-3: OK

ydbd size dash	stable-25-3: 274bf65	merge: 118046d	diff	diff %
ydbd size	2 440 558 960 Bytes	2 440 558 816 Bytes	-144 Bytes	-0.000%
ydbd stripped size	522 432 776 Bytes	522 432 712 Bytes	-64 Bytes	-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]

⚪ 2025-11-12 06:40:35 UTC Pre-commit check linux-x86_64-release-asan for 118046d has started.
⚪ 2025-11-12 06:40:50 UTC Artifacts will be uploaded here
⚪ 2025-11-12 06:44:25 UTC ya make is running...
🟡 2025-11-12 08:57:24 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?
15466	14903	0	237	309	17

🟢 2025-11-12 08:58:39 UTC Build successful.
🟢 2025-11-12 08:59:05 UTC ydbd size 3.8 GiB changed* by +25.0 KiB, which is < 100.0 KiB vs stable-25-3: OK

ydbd size dash	stable-25-3: ab4b422	merge: 118046d	diff	diff %
ydbd size	4 061 986 896 Bytes	4 062 012 520 Bytes	+25.0 KiB	+0.001%
ydbd stripped size	1 513 687 264 Bytes	1 513 688 352 Bytes	+1.1 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}