Bulk Verify Endpoint

Run verification checks on multiple documents in a single request.

Request body: {"document_ids": ["doc_xxx", "doc_yyy", ...]} Max 25 documents per request. Each successful verification counts as one IDV check.

Quota: enforced per-document — mirrors the single-document /documents/{id}/verify endpoint. A free-plan org that hits its monthly IDV ceiling mid-batch will see subsequent documents fail with quota_exceeded; the verifications that already ran are still billed. Without this gate, the bulk path would let a free plan unboundedly exceed its quota by submitting batches of up to MAX_BULK_SIZE.