sundapeng opened a new pull request, #9482:
URL: https://github.com/apache/paimon/pull/9482

   ### Purpose
   
   `format-table.statistics.parallelism` can be set to zero or a negative value 
through Spark configuration. The NOSCAN collector already clamps it to at least 
one, but full ANALYZE used the raw value to derive Spark task count. Zero 
caused division by zero and a negative value produced an invalid partition 
count before any footer was read.
   
   This change applies the same lower bound before deriving executor tasks and 
per-task file concurrency.
   
   ### Tests
   
   - `CatalogManagedPartitionAnalyzeTest` with Spark 3: 23/23
   - `CatalogManagedPartitionAnalyzeTest` with Spark 4: 23/23
   - Mutation check: a zero-only guard fails the new negative-value arm
   - Spotless check for the affected Spark modules


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