flyemoji
75642d90cf
Introduce internal/metrics exposing the four metric families spec §23 mandates at minimum: felis_servers_total (gauge by desired state), felis_start_duration_seconds (histogram with Minecraft cold-start buckets), felis_image_build_failures_total and felis_reaper_worlds_deleted_total (counters). Collectors are package-level vars so any subsystem records without an import cycle; Register wires them into a prometheus.Registerer and is idempotent. Wire registration into the operator against controller-runtime's global Registry, so /metrics on the manager's existing metrics endpoint carries the felis_* families. Instrument the reaper to increment felis_reaper_worlds_deleted_total in lockstep with Summary.WorldsReaped, at the one point a world's PVC has actually been deleted.