mao-liu opened a new pull request, #8128:
URL: https://github.com/apache/paimon/pull/8128

   ### Purpose
   
   Enable dedicated Flink compactor jobs to use the sink writer coordinator 
when `sink.writer-coordinator-enabled` is set. This wires 
`StoreCompactOperator` through a coordinated operator factory so compactor 
writes can use `CoordinatedWriteRestore`, while preserving the existing 
non-coordinated path by default.
   
   Follows the existing implementation for `RowDataStoreWriteOperator` and 
`FixedBucketSink`
   
   ### Tests
   
   - Unit tests: Added `StoreCompactOperator` tests for coordinator provider 
creation and coordinated compaction behaviour in both streaming and full 
compaction modes.
   - Integration tests: Added coverage for `CompactorSink` with writer 
coordinator enabled and disabled.


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