Add a blackbox-http probe of kuma.renner.uno with a dedicated critical UptimeKumaUnreachable rule (excluded from BlackboxProbeFailing), scrape Kuma /metrics with the API key from OpenBao, and alert on sustained slow monitor response times. No egress policy exists in the monitoring namespace, so no CNP change is needed. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>