Highlights

• Build can auto-download matching prebuilt libduckdb via DUCKDB_DOWNLOAD_LIB=1.
• Appenders now support column subsets and column switching; defaults/NULLs fill the rest.
• Table functions can store extra info via the new register_table_function_with_extra_info.
• Scalar functions can be marked volatile using the volatile trait method.
• Logical type coverage broadened (new DuckDB IDs, Unsupported fallback).
• Updated bundled DuckDB to v1.4.3

What's Changed

• Update Rust to 1.91 by @mlafeldt in https://github.com/duckdb/duckdb-rs/pull/626
• Download pre-built DuckDB libraries by @mlafeldt in https://github.com/duckdb/duckdb-rs/pull/628
• Handle invalid & unsupported DuckDB types more gracefully by @mlafeldt in https://github.com/duckdb/duckdb-rs/pull/629
• Add missing LogicalTypeId variants to match DuckDB C API by @leo-altertable in https://github.com/duckdb/duckdb-rs/pull/630
• Allow to pass extra info to table functions by @mlafeldt in https://github.com/duckdb/duckdb-rs/pull/637
• Align scalar state semantics and revert TableFunctionOptions by @mlafeldt in https://github.com/duckdb/duckdb-rs/pull/638