feat(rust): (WONT MERGE, DESIGN DISSCUSSION)add metadata module structure and data types

[vikrantpuppala]

🥞 Stacked PR

Use this link to review incremental changes.

• stack/metadata-module-structure-data-types [Files changed]
  • stack/sql-command-builder [Files changed]
    • stack/type-mapping-functions [Files changed]
      • stack/metadata-service-core [Files changed]
        • stack/get-objects-builder-nested-arrow [Files changed]
          • stack/metadata-service-table-column-methods [Files changed]
            • stack/connection-metadata-methods [Files changed]
              • stack/metadata-unit-integration-tests [Files changed]

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Create the foundation for ADBC Connection interface metadata methods:

• Add metadata module with mod.rs and types.rs
• Implement CatalogInfo, SchemaInfo, TableInfo structs for listing metadata
• Implement ColumnInfo struct with full XDBC field support
• Implement PrimaryKeyInfo and ForeignKeyInfo structs for constraints
• Add comprehensive unit tests for struct instantiation and cloning

This establishes the data structures needed for get_objects(),
get_table_schema(), and other metadata query operations.

Co-Authored-By: Claude Opus 4.5 noreply@anthropic.com

What's Changed

Please fill in a description of the changes here.

This contains breaking changes.

Closes #NNN.

[lidavidm]

Can we have Claude at least ensure pre-commit passes? cargo fmt also needs to be added to pre-commit. Also we should set up some CI to build the Rust code as well. I can enable the pregenerated workflows that other drivers use.

[jadewang-db]

Assuming that this PR stack is based on this design. I think we need consider the design/implementing sequence of the driver. it should be

1. basic connection and statement execution design and implementation (since metadata operation depend on this).
2. metadata operation implementation
3. cloudfetch implemenmtation
4. auth related.
5. client telemetry.

[jadewang-db]

Can we have Claude at least ensure pre-commit passes? cargo fmt also needs to be added to pre-commit. Also we should set up some CI to build the Rust code as well. I can enable the pregenerated workflows that other drivers use.

yes, we will, @lidavidm as I replied in the other comment, we are still in design discussion, the code generated here just to validate the design for now, no intend to merge of this.