feat(gitea): enable /metrics for Prometheus scraping

Gitea shipped metrics disabled, so its scrape target was a permanent
structural down beside a healthy service.

dankclaw/gitea/quadlet/gitea-server.container

@@ -29,6 +29,13 @@ Environment=DATABASE_PASSWD=${GITEA_DB_PASSWORD}
 Environment=DATABASE_PORT=5432
 Environment=USER_UID=1000
 Environment=USER_GID=1000
+# Prometheus scrapes /metrics over the published LAN port (job "gitea" in
+# shared/prometheus/prometheus.yml). Off, /metrics is a 404 and the target is
+# permanently red (the audit's "disabled metrics" class). 0.0.0.0 binds inside
+# the container; the only route in is this host's published 3000, and the
+# exposed surface is counters only — same posture as the LLM /metrics.
+Environment=GITEA__metrics__ENABLED=true
+Environment=GITEA__metrics__ENABLED_HOST=0.0.0.0
 PublishPort=0.0.0.0:3000:3000
 PublishPort=2222:22
 Volume=/home/dank/Containers/gitea/data:/data