Single notify step now runs for both success and failure
(when.status: [success, failure]), branching on
CI_PIPELINE_STATUS for the title. Success uses Pushover
priority -1 (quiet) so passing-build pings don't alert at
night; failures stay at priority 0 (default).
Uses pushover_token and pushover_user secrets configured in Woodpecker.
Step runs only on failure (when.status: failure) so successful runs stay
quiet. Message includes branch, commit message, and a link back to the
pipeline.