JingsongLi opened a new pull request, #9305:
URL: https://github.com/apache/paimon/pull/9305

   ## What changed
   
   - remove `MultiValueIndexFileMeta` and its element-type trailer
   - write standard `SortedIndexFileMeta` from the multivalue index writer
   - stop checking schema compatibility in the multivalue index reader
   - update the multivalue index tests for the shared metadata format
   
   ## Why
   
   Schema evolution should be handled centrally by `IndexManifestEntry` instead 
of being implemented separately by individual index formats.
   
   ## Impact
   
   Multivalue indexes now use the same sorted index metadata contract as other 
sorted indexes, without embedding schema-evolution state in index metadata.
   
   ## Tests
   
   - `mvn -pl paimon-common -Pfast-build -DwildcardSuites=none 
-Dtest=MultiValueBitmapIndexReaderTest test`
   - `mvn -pl paimon-common -DskipTests compile`
   


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