discivigour opened a new pull request, #8620:
URL: https://github.com/apache/paimon/pull/8620

   ### Purpose
   
   Parallelize BLOB materialization in BlobFallbackBatchReader when 
blob_parallelism is greater than 1.
   
   Keep candidate BLOBs lazy until fallback selects the newest non-placeholder 
version, propagate blob_parallelism through data-evolution reads, and preserve 
descriptor-only behavior without materializing BLOB bytes.
   
   ### Tests
   
   - source ~/.zprofile && pyenv activate py310 && python -m unittest 
pypaimon.tests.blob_test
   - source ~/.zprofile && pyenv activate py310 && python -m unittest 
pypaimon.tests.data_evolution_deletion_vector_test
   - git diff --check origin/master...HEAD


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