Add decimal FFI import/export with arrow-rs and Polars round-trips - #186
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* Add DecimalArray foundation and i128 trait impls (#181) * Add Decimal32, Decimal64, Decimal128 variants to ArrowType (#180) * Wire DecimalArray into NumericArray, Array, Scalar with From impls (#182) * Wire DecimalArray into NumericArray, Array, and Scalar enums with From impls and tests (#182) * Implement decimal conversion arms in NumericArray try_ accessors * Add decimal FFI import/export with arrow-rs and Polars round-trips (#186) * Add decimal FFI import/export with arrow-rs and Polars round-trips * Integrate DecimalArray into Value, ArrayV, NumericArrayV, SuperArray, SuperArrayV, and Consolidate (#187) * Add decimal broadcast dispatch and scale-aware print formatting (#184) * Add decimal arithmetic kernels with checked overflow and auto-promotion + fix null mask drop on broadcasting (#185) * Add decimal arithmetic kernels with checked overflow and auto-promotion * Propagate null mask through broadcast for all array types * Add DecimalArray type conversions and width conversion methods (#183) * Add decimal support to pyo3 and minarrow-py Python bridges (#188) * Add Decimal32 and Decimal64 round-trip tests for arrow-rs * Add decimal support to pyo3 and minarrow-py Python bridges * Make precision and scale report values for all numeric types
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Summary
import_from_candimport_from_c_ownedfor all three decimal widths (replaces placeholder panics from TSK376)export_to_candexport_view_to_cwith windowed offset support for 4, 8, and 16 byte element widthsTest plan
cargo test --features "decimal,cast_arrow"passescargo test --features "decimal,cast_polars"passescargo testwithout decimal passes (no regression)