Fix row to recordbatch conversion errors#36500

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DAlperin wants to merge 8 commits into

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claude/fix-recordbatch-conversion-tFyg9

Commits on May 11, 2026

iceberg: fix recordbatch conversion for smallint, maps, and range keys
claude
committed
iceberg: link Arrow Map spec from positional-merge comment
claude
committed
iceberg: add tests covering smallint, map, and range-key fixes
claude
committed
iceberg: drop useless as_ref on Option<&Field>
claude
committed
iceberg: verify map sink via status, not DuckDB iceberg_scan
claude
committed
arrow-util: derive map field names from schema, not arrow-rs defaults
claude
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arrow-util: forward key field metadata in MapBuilder, not just value field
DAlperin
committed
ci/testdrive: pick libduckdb.so matching the image arch, not whichever sorts last
DAlperin
committed