Direct document ingestion (≤50 MB) · 1 credit (+1 for premium transcription)

multipart/form-data: file (REQUIRED) + optional doc_type (catalog), document_date (YYYY-MM-DD, the date OF the document), privileged (work product), language, engine (standard|premium, audio/video only). The debit is performed by the internal ingestion route (single debit + refund on failure). The caller's metadata is NOT overwritten by auto-extraction. Large files (audio ≤200 MB / video ≤500 MB): presign+process flow. source_url NOT supported (SSRF surface — deferred). ⚠️ Sliding window: each ingestion rearms purge_after.