wbhk
batch.completed
All items in a batch finished processing; data.object contains the Batch with counts {total, succeeded, failed} — fetch per-item outcomes via GET /batches/{id}/items.
200Return any 2xx within 10 seconds to acknowledge receipt. Failures retry at 1m, 5m, 30m, 2h, 6h, then every 12h up to 72h.