The CSV import loop ran a findUnique duplicate check before every
single create — up to 2000 sequential round trips on a 1000-row
import. Resolve takenAt + the idempotency key for every row first,
then read every key's existence in one indexed query before the write
loop; create and the per-row inventory consumption stay unchanged.
Also runs prettier over the batch-route test files touched in the
prior two commits.
Marc-André Bombeck
e3dfe9f400