[PR] Support REST format table reads [paimon-rust]

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

JingsongLi opened a new pull request, #492:
URL: https://github.com/apache/paimon-rust/pull/492

   ## Summary
   
   Adds read support for RESTCatalog format tables while keeping format-table implementation separate from ordinary Paimon table paths.
   
   ## Changes
   
   - Detect `type=format-table` metadata and route read, scan, and write builders through dedicated format-table implementations.
   - Load REST table `path` into schema options for format tables and scan external format-table files directly.
   - Add partition predicate pruning for format table scans, including direct partition path scans for exact partition predicates and leading equality path pruning.
   - Keep format-table writes fail-closed with explicit unsupported errors.
   - Add RESTCatalog integration coverage for plain and partitioned format-table reads.
   
   ## Testing
   
   - `cargo fmt --check && git diff --check`
   - `cargo test -p paimon --test rest_catalog_test`
   - `cargo test -p paimon --test rest_catalog_test test_rest_catalog_prunes_format_table_partition_filter`
   - `cargo test -p paimon --test rest_catalog_test test_rest_catalog_reads_format_table`
   - `cargo test -p paimon table_scan`
   - `cargo test -p paimon read_builder`
   
   ## Notes
   
   Data-column predicates continue to be passed to the file reader for format-level pruning/filtering. Format-table scan now uses partition predicates to avoid unnecessary directory scans where possible.


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Re: [PR] Support REST format table reads [paimon-rust]

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

JingsongLi merged PR #492:
URL: https://github.com/apache/paimon-rust/pull/492


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