post
https://stage-api.findity.com/api/v1/expense/content
Uploads a binary file as a Content resource the client can later attach to an expense record (e.g. as a receipt). The created resource is temporary — owned by the caller and eligible for cleanup if it is not subsequently attached. When action=scan is passed, the OCR result is persisted on the resource so it can be referenced later without re-scanning.
