Fixed lost onPartitionSessionClosed event

[alex268]

No description provided.

[Copilot]

Pull request overview

This PR addresses a missing onPartitionSessionClosed callback for force (non-graceful) StopPartitionSessionRequest handling in the Topic read session implementation, and adds an integration test that exercises changefeed consumption and validates the close event delivery.

Changes:

• Emit onPartitionSessionClosed for force-stopped partition sessions in ReadSession.
• Add a new changefeed integration test that validates partition session lifecycle events, including close.
• Add the Table SDK as a test-scoped dependency for the topic module to support the new integration test.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
topic/src/main/java/tech/ydb/topic/read/impl/ReadSession.java	Calls handleClosePartitionSession when receiving a force stop request so onPartitionSessionClosed isn’t skipped.
topic/src/test/java/tech/ydb/topic/ChangefeedTopicTest.java	New integration test covering changefeed reads and verifying partition session close events and reader close ordering.
topic/src/test/java/tech/ydb/topic/TopicReadersIntegrationTest.java	Cleans up unused imports/reorders imports (no functional change).
topic/pom.xml	Adds ydb-sdk-table as a test dependency to compile/run the new changefeed test.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.29%. Comparing base (f2c9615) to head (44d9e98).

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #649      +/-   ##
============================================
+ Coverage     71.09%   71.29%   +0.19%     
- Complexity     3358     3365       +7     
============================================
  Files           379      379              
  Lines         15915    15916       +1     
  Branches       1669     1669              
============================================
+ Hits          11315    11347      +32     
+ Misses         3955     3917      -38     
- Partials        645      652       +7     

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