wayneli-vt opened a new pull request, #8072:
URL: https://github.com/apache/paimon/pull/8072

   ### Purpose
   
   Support split-granularity bin packing when `data-evolution.enabled` is 
enabled.
   
   Data evolution splits must remain intact. Add split-granularity bin packing 
to avoid reshuffling files across splits, while still grouping whole splits by 
target size. Oversized splits are kept as-is.
   
   Also refactor test helpers to reduce boilerplate.
   
    ### Tests
   
   - Added `BinPackingSplitsTest` coverage for split-granularity packing.
   - Added coverage for oversized data evolution splits.
   - Existing bin packing tests remain unchanged and passing.
   


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