Admin-assisted services (UCR, MC authority, etc.) have no automated submission,
so approving them only flips to authorization_signed and then sits there -- there
was no way to advance to completed. Add POST /mark-filed (filed_waiting_state |
completed, optional confirmation #, transactional + audit-logged) and drawer
buttons 'Mark as filed (waiting on agency)' / 'Mark completed' shown for orders in
authorization_signed / ready_to_file / filed_waiting_state. Confirmation number
is recorded into intake_data.filing_status.manual_confirmation.