Add automatic external HTTPS monitors to Uptime Kuma for ~96 services
exposed via Cloudflare tunnel. A sync CronJob (every 10min) reads from
a Terraform-generated ConfigMap and creates/deletes [External] monitors
to match cloudflare_proxied_names. Status page groups these separately
as "External Reachability" and pushes a divergence metric to Pushgateway
when services are externally down but internally up. Prometheus alert
ExternalAccessDivergence fires after 15min of divergence.
[ci skip]
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>