shape-doctor.py: a validator's verdict is a printed FINDING or REFUSED and any other non-zero exit is a crash, so a gate killed by a signal, ended by os._exit(1), holding conflict markers or failing argparse no longer "reports a finding", a crash of the standard's own naming script is CANNOT ANSWER instead of INVALID (naming), and a pass that printed WARNING or note lines is a note quoting them while a red row quotes its finding and never a warning (#410, #448) - #557