Generic webhook notification delivery configured via the
notify_webhook settings key — no new schema. Fires on monitor
up/down transitions (pending stays silent), domain expiry,
domain expiring, and TLS cert expiring; dispatch is async and
failures are logged, never fatal.
POST /api/notify/test verifies configuration; Settings dialog
gains a webhook URL field with save + send-test. Payload carries
event/name/text/content/message so Slack, Discord, ntfy, and
custom receivers all work.
Generated with [Devin](https://devin.ai)
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>