[CONFLICT] [Backport stable-25-3] PR #30854: EXT-1793 Fix when reading from the end of uncommitted partition

[ydbot]

Changelog entry

EXT-1793 Fix when reading from the end of uncommitted partition

Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

Original PR(s)

• PR EXT-1793 Fix when reading from the end of uncommitted partition #30854

Metadata

• Original PR author(s): @UgnineSirdis
• Cherry-picked by: @UgnineSirdis
• Related issues: None

Conflicts Require Manual Resolution

This PR contains merge conflicts that require manual resolution.

Files with conflicts:

• ydb/core/persqueue/pqrb/read_balancer__balancing.cpp

How to resolve conflicts:

git fetch origin
git checkout --track origin/cherry-pick-stable-25-3-251223-125747
# Resolve conflicts in files
git add .
git commit -m "Resolved merge conflicts"
git push

After resolving conflicts:

1. Fix the PR title (remove [CONFLICT] if conflicts are resolved)
2. Mark PR as ready for review

Git Cherry-Pick Log

=== Cherry-picking 45f5616 ===
Auto-merging ydb/core/persqueue/pqrb/read_balancer__balancing.cpp
CONFLICT (content): Merge conflict in ydb/core/persqueue/pqrb/read_balancer__balancing.cpp
Auto-merging ydb/core/persqueue/pqrb/read_balancer__balancing.h

error: could not apply 45f5616be25... EXT-1793 Fix when reading from the end of uncommitted partition (#30854)
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".

---

PR was created by cherry-pick workflow run

[github-actions]

⚪ 2025-12-23 12:59:26 UTC Pre-commit check linux-x86_64-release-asan for d1c0de7 has started.
⚪ 2025-12-23 13:00:07 UTC Artifacts will be uploaded here
⚪ 2025-12-23 13:04:20 UTC ya make is running...
🔴 2025-12-23 13:07:58 UTC Build failed, see the logs. Also see fail summary

[github-actions]

🟢 2025-12-23 12:59:56 UTC The validation of the Pull Request description is successful.

[ydbot]

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[github-actions]

⚪ 2025-12-23 13:01:34 UTC Pre-commit check linux-x86_64-relwithdebinfo for d1c0de7 has started.
⚪ 2025-12-23 13:01:49 UTC Artifacts will be uploaded here
⚪ 2025-12-23 13:05:18 UTC ya make is running...
🔴 2025-12-23 13:08:34 UTC Build failed, see the logs. Also see fail summary