The missing piece of hands-off updates/backups: when a task fails while
nobody has the WebUI open, LibrePortal now says so — email (via the
existing Mail settings), ntfy, Gotify, Discord, Slack, Telegram, or
Pushover, configured under Settings → Notifications.
One hook, everywhere: the task processor reports every terminal task to
`libreportal notify task <id>` (detached, never load-bearing — hard curl
timeouts, failures ignored). The POLICY lives in the notify command, not
the daemon: CFG_NOTIFY_EVENTS = failures (default) | all | off, and
cancelled tasks never notify. Failure copy is task-aware — a failed
update says the app was already rolled back and won't be retried, so the
reader knows the box is safe before opening the WebUI.
`libreportal notify test` sends to every enabled channel with per-channel
results. Verified against a local mock endpoint: all webhook payloads,
JSON escaping (quotes/newlines), the events policy, and fail-fast on
dead endpoints (8ms, exit nonzero).
The v0.1.0 per-app NOTIFY_* field-mapping scaffolding (never wired to a
sender) stays as-is; this global channel is the system it was waiting on.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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