Fixed commit hanging if commitOffset < readOffset

[alex268]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.59%. Comparing base (573806b) to head (7bbfaa4).

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #620      +/-   ##
============================================
+ Coverage     69.49%   69.59%   +0.09%     
- Complexity     3167     3172       +5     
============================================
  Files           362      362              
  Lines         15455    15455              
  Branches       1628     1628              
============================================
+ Hits          10741    10756      +15     
+ Misses         4047     4033      -14     
+ Partials        667      666       -1     

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[Copilot]

Pull request overview

Fixes a reader commit hang when a partition session is started with commitOffset < readOffset (e.g., when emulating retention / skipping old offsets), and re-enables the previously ignored integration test that was freezing in that scenario.

Changes:

• Adjusts ReadPartitionSession initialization so commit-range tracking starts from the committed/commit offset rather than the read offset.
• Updates ReadSession partition-session creation to align with the new ReadPartitionSession constructor semantics.
• Re-enables readRetentionedTopicTest by removing @Ignore.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
topic/src/test/java/tech/ydb/topic/impl/TopicReadersIntegrationTest.java	Re-enables the retention/skip scenario integration test that previously froze.
topic/src/main/java/tech/ydb/topic/read/impl/ReadSession.java	Separates readFrom vs commitTo offsets and wires the partition session with the commit offset.
topic/src/main/java/tech/ydb/topic/read/impl/ReadPartitionSession.java	Changes constructor and initializes internal offset tracking from the committed/commit offset to prevent commit hangs.

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