Start an ingestion workflow that processes pending uploads (see
GET /api/v3/pcb/{pcb_id}/{pcb_version}/ingestion/uploads).

MacroFab identifies each file (EDA board files, gerbers, drill files, ODB++, BOM
spreadsheets, XYRS placement files, fabrication drawings, archives, and so on), extracts or
generates gerbers, and detects specifications such as layer count and board size. Nothing
changes on the PCB version until you accept the results.

Poll GET /api/v3/pcb/{pcb_id}/{pcb_version}/ingestion/workflow/{workflow_id} until
current_stage is awaiting_resolution, then accept or reject the results.