Upload ANY file and let the system decide what it is (the unified intake queue — the same door as "Documents → Upload" in the web app). file_base64 is the file's raw bytes, base64-encoded.

Prefer this whenever the file is not plainly an invoice, and always for: bank statements (CAMT.053 XML, CSV, PDF or Excel exports) — these become BankStatement + BankEntry rows, matched to the registered bank account by IBAN; journal/accounting exports; and balance sheets, P&L statements and VAT filings. Mixed .zip archives are expanded and routed per file.

Returns 202 with the queue row: routing happens asynchronously, so poll get_intake for the outcome and its targets. An unroutable file becomes a failed queue row carrying the reason — it is never silently dropped.