We've had basic logging to see when a bookstore sends us a file over its SFTP connection, but now we have real observability every time we receive one. This sits alongside the robust logging we already have in the data pipeline, available in the staff UI. SFTP is the step before all of that, so better monitoring here gives us an audit log of every event from the moment a file arrives. This makes debugging far easier if anything ever goes wrong with the SFTP server.