Every pre-apply exit of `hermes update` records one closed token on the
receipt at the exit itself (update_receipt.record_stop_reason ->
stop_class), and shared_metrics_update.update_failure_class maps it to
the run's failure_class. aborted_before_apply stays only as the fallback
for an exit with no recorded reason.
Exits that fire before the receipt opens (update-lock refusal, Git
operation in progress, managed install) write no receipt, as before, but
now record a metrics-only row with the same closed class.
The parked receipt copy keeps stop_class, exit_code, the stop reason's
leading label and the restart/user-action flags, so a parked run
classifies the same as the in-process one. A run that committed and is
owed only an interrupt or the user's parked changes reads outcome
partial (failure_class interrupted / local_changes_parked), never failed.
