Highlights

• Appender::append_rows now accepts tuples for heterogeneous data types directly.
• Loadable extension setup simplified: single loadable-extension feature replaces vtab-loadable + loadable-extension.
• duckdb_entrypoint_c_api macro re-exported from main crate - no need to depend on duckdb-loadable-macros directly anymore.
• stream_arrow() now works with CALL statements via automatic fallback to duckdb_fetch_chunk().
• Streaming execution returns descriptive DuckDB error messages instead of "Unknown error code".
• Performance: ~2x faster column name lookups via lazy HashMap cache; removed redundant null checks; zero-copy FlatVector::insert for strings.
• Build: fixed static linking (libduckdb_static.a) and cargo cache invalidation from absolute OUT_DIR.
• Updated bundled DuckDB to v1.4.4 and Rust to 1.93.

What's Changed

• Update Cargo.lock and bump crate version in README by @mlafeldt in https://github.com/duckdb/duckdb-rs/pull/646