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]

🟢 2025-11-12 09:38:24 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-11-11 22:42:41 UTC Pre-commit check linux-x86_64-relwithdebinfo for fd2b549 has started.
⚪ 2025-11-11 22:42:57 UTC Artifacts will be uploaded here
⚪ 2025-11-11 22:46:33 UTC ya make is running...
🟡 2025-11-12 00:10:56 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
30635	29311	0	13	1292	19

⚪ 2025-11-12 00:13:29 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-11-12 00:29:25 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?
553 (only retried tests)	534	0	2	1	16

⚪ 2025-11-12 00:29:35 UTC ya make is running... (failed tests rerun, try 3)
🔴 2025-11-12 00:45:35 UTC Some tests failed, follow the links below.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
529 (only retried tests)	512	0	1	0	16

🟢 2025-11-12 00:45:44 UTC Build successful.
🟢 2025-11-12 00:45:58 UTC ydbd size 2.3 GiB changed* by -80 Bytes, which is <= 0 Bytes vs stable-25-3-1: OK

ydbd size dash	stable-25-3-1: d428e61	merge: fd2b549	diff	diff %
ydbd size	2 435 757 208 Bytes	2 435 757 128 Bytes	-80 Bytes	-0.000%
ydbd stripped size	521 623 592 Bytes	521 623 592 Bytes	0 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]

⚪ 2025-11-11 19:27:20 UTC Pre-commit check linux-x86_64-release-asan for fd2b549 has started.
⚪ 2025-11-11 19:27:36 UTC Artifacts will be uploaded here
⚪ 2025-11-11 19:31:05 UTC ya make is running...
🟡 2025-11-11 21:30:22 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?
15320	14778	0	196	326	20

🟢 2025-11-11 21:31:33 UTC Build successful.
🟢 2025-11-11 21:31:58 UTC ydbd size 3.8 GiB changed* by +256 Bytes, which is < 100.0 KiB vs stable-25-3-1: OK

ydbd size dash	stable-25-3-1: d428e61	merge: fd2b549	diff	diff %
ydbd size	4 053 152 096 Bytes	4 053 152 352 Bytes	+256 Bytes	+0.000%
ydbd stripped size	1 510 632 608 Bytes	1 510 632 608 Bytes	0 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 06:40:03 UTC Pre-commit check linux-x86_64-release-asan for 88f6890 has started.
⚪ 2025-11-12 06:40:20 UTC Artifacts will be uploaded here
⚪ 2025-11-12 06:43:58 UTC ya make is running...
🟡 2025-11-12 08:55:56 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?
15320	14721	0	228	353	18

🟢 2025-11-12 08:57:09 UTC Build successful.
🟢 2025-11-12 08:57:35 UTC ydbd size 3.8 GiB changed* by +256 Bytes, which is < 100.0 KiB vs stable-25-3-1: OK

ydbd size dash	stable-25-3-1: d428e61	merge: 88f6890	diff	diff %
ydbd size	4 053 152 096 Bytes	4 053 152 352 Bytes	+256 Bytes	+0.000%
ydbd stripped size	1 510 632 608 Bytes	1 510 632 608 Bytes	0 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 09:32:33 UTC Pre-commit check linux-x86_64-relwithdebinfo for 88f6890 has started.
⚪ 2025-11-12 09:32:50 UTC Artifacts will be uploaded here
⚪ 2025-11-12 09:36:30 UTC ya make is running...
🟡 2025-11-12 11:03:42 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
30635	29302	0	18	1292	23

⚪ 2025-11-12 11:06:11 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-11-12 11:20:36 UTC Tests successful.

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
629 (only retried tests)	612	0	0	1	16

🟢 2025-11-12 11:20:45 UTC Build successful.
🟢 2025-11-12 11:20:59 UTC ydbd size 2.3 GiB changed* by -80 Bytes, which is <= 0 Bytes vs stable-25-3-1: OK

ydbd size dash	stable-25-3-1: d428e61	merge: 88f6890	diff	diff %
ydbd size	2 435 757 208 Bytes	2 435 757 128 Bytes	-80 Bytes	-0.000%
ydbd stripped size	521 623 592 Bytes	521 623 592 Bytes	0 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}