feat(monitoring): add mana-geocoding + Pelias to prod compose, Prometheus, Grafana, and status.mana.how

Production deployment + observability for the self-hosted geocoding stack:

**docker-compose.macmini.yml**
- New mana-geocoding container (port 3018, internal-only — no traefik
  labels, no Cloudflare route). Uses host.docker.internal to reach the
  Pelias API on the host's pelias compose stack. Dockerfile added under
  services/mana-geocoding/ using the same Bun/Hono pattern as mana-events.

**Prometheus**
- New blackbox-internal job probing mana-geocoding:3018/health, the
  Pelias API on host.docker.internal:4000/v1/status, and Elasticsearch
  at host.docker.internal:9200/_cluster/health. Kept separate from
  blackbox-api which is reserved for public HTTPS endpoints.

**status.mana.how (generate-status-page.sh)**
- Include blackbox-internal in the metric query and add an "Interne
  Dienste" section with its own summary card, right between Infrastruktur
  and GPU Dienste. Summary grid goes from 4 to 5 columns with a
  900px breakpoint.
- friendly_name() now handles http:// URLs and rewrites container-name
  hosts like mana-geocoding:3018/health → "Mana Geocoding",
  host.docker.internal:4000 → "Pelias API",
  host.docker.internal:9200 → "Pelias Elasticsearch".

**Grafana uptime dashboard**
- Add an "Internal" series to the "Alle Dienste — Uptime-Verlauf" panel
- New "Interne Dienste Status" table panel showing per-instance up/down
- New "Geocoding Ø Latenz" stat panel for probe_duration_seconds

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.macmini.yml

@@ -362,6 +362,40 @@ services:
       - "traefik.http.routers.mana-events.tls=true"
       - "traefik.http.services.mana-events.loadbalancer.server.port=3065"
 
+  # ─── Geocoding ───────────────────────────────────────────
+  # Thin Hono wrapper in front of a self-hosted Pelias stack.
+  # Pelias itself (elasticsearch + api + libpostal) runs from a separate
+  # compose file in services/mana-geocoding/pelias/ — see
+  # services/mana-geocoding/CLAUDE.md for the initial import procedure.
+  # Internal-only: no traefik labels, not exposed via Cloudflare.
+  mana-geocoding:
+    build:
+      context: services/mana-geocoding
+      dockerfile: Dockerfile
+    image: mana-geocoding:local
+    container_name: mana-geocoding
+    restart: always
+    mem_limit: 128m
+    # Pelias runs on host network via its own compose, so the wrapper
+    # reaches it via host.docker.internal (Pelias API at :4000).
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    environment:
+      TZ: Europe/Berlin
+      PORT: 3018
+      PELIAS_API_URL: http://host.docker.internal:4000/v1
+      CORS_ORIGINS: https://mana.how,http://localhost:5173
+      CACHE_MAX_ENTRIES: "5000"
+      CACHE_TTL_MS: "86400000"
+    ports:
+      - "3018:3018"
+    healthcheck:
+      test: ["CMD", "bun", "-e", "fetch('http://127.0.0.1:3018/health').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"]
+      interval: 120s
+      timeout: 10s
+      retries: 3
+      start_period: 15s
+
   mana-user:
     build:
       context: services/mana-user