[PR] feat: add Mosaic row-group predicate pruning [paimon-rust]

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

QuakeWang opened a new pull request, #393:
URL: https://github.com/apache/paimon-rust/pull/393

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   ### Purpose
   
   <!-- Linking this pull request to the issue -->
   Linked issue: Related to #378
   
   Mosaic reads previously treated data predicates as residual only, so row groups were read even when Mosaic row-group statistics could prove they could not match.
   
   This PR adds conservative row-group predicate pruning for Mosaic files while preserving residual filtering semantics.
   
   <!-- What is the purpose of the change -->
   
   ### Brief change log
   
   <!-- Please describe the changes made in this pull request and explain how they address the issue -->
   
     - Add a Mosaic `StatsAccessor` over row-group `ColumnStats`.
     - Map file-level Paimon fields to Mosaic column indices by name.
     - Convert supported Mosaic stats values into Paimon `Datum` for shared stats pruning.
     - Fail open when stats are missing or cannot be interpreted safely.
     - Update `ReadBuilder` docs to describe generic format-level reader pruning.
   
   ### Tests
   
   <!-- List unit tests or integration cases to verify this change -->
   
     - `cargo test -p paimon --features mosaic arrow::format::mosaic::tests -- --nocapture`
     - `cargo fmt --check`
   
   ### API and Format
   
   <!-- Does this change affect API or storage format -->
   
   ### Documentation
   
   <!-- Does this change introduce a new feature or require documentation updates -->
   


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Re: [PR] feat: add Mosaic row-group predicate pruning [paimon-rust]

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

JingsongLi merged PR #393:
URL: https://github.com/apache/paimon-rust/pull/393


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