The bench's own measure_random_access_lance uses take(row_position) —
doesn't need the btree. But datasets written by this bench are commonly
queried via /vectors/lance/doc/<name>/<doc_id> downstream, and without
the btree that path falls back to a full table scan. Building inline
keeps bench-produced datasets immediately production-shape and removes
a footgun (the same one that made scale_test_10m's doc-fetch ~100ms
until commit 5d30b3d fixed it via the migrate handler path).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
044650a1da