[PR] [core] Fix format table date partition pruning [paimon]

["leaves12138 (via GitHub)" <gi...@apache.org>]

leaves12138 opened a new pull request, #8011:
URL: https://github.com/apache/paimon/pull/8011

   ### Purpose
   
   Fix `FormatTableScan` equality partition path optimization for partition columns whose internal literal representation differs from the partition directory string.
   
   For example, a DATE partition predicate `dt = DATE '2026-05-01'` is represented internally as epoch days (`20574`). The previous code used `literal.toString()` when building the optimized partition path, producing `dt=20574/` instead of the actual `dt=2026-05-01/`, which caused zero splits to be returned.
   
   ### Changes
   
   - Convert equality partition literals to their partition string representation via Paimon's cast framework before generating the partition path.
   - Pass `partitionType` into `extractLeadingEqualityPartitionSpecWhenOnlyAnd` so the literal can be formatted according to its field type.
   - Add a regression test covering DATE partition equality pruning for both normal partition paths and value-only partition paths.
   
   ### Tests
   
   - `mvn -pl paimon-core -Pfast-build -DfailIfNoTests=false -Dtest=FormatTableScanTest#testComputeScanPathWithDateEqualityFilter test`
   - `mvn -pl paimon-core -Pfast-build -DfailIfNoTests=false -Dtest=FormatTableScanTest test`
   - `mvn -pl paimon-core spotless:apply`
   


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Re: [PR] [core] Fix format table date partition pruning [paimon]

["leaves12138 (via GitHub)" <gi...@apache.org>]

leaves12138 merged PR #8011:
URL: https://github.com/apache/paimon/pull/8011


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