feat: initialize serverAppConfigs with podman stacks for Dankserver and Dankclaw

- Dankserver stack: RomM, Copyparty, Calibre-Web, node-exporter
- Dankclaw stack: Gluetun VPN (SearXNG tunnel), SearXNG+Valkey, ComfyUI
  (CPU backend), OpenWebUI, Hermes, Gitea+Postgres (migrated), Caddy
  reverse proxy, Grafana+Prometheus+Loki+Alloy observability
- Caddyfiles with .local hostname convention and basicauth homepage
- bind-mount storage policy, no named volumes
- deploy.sh mirroring vllmScripts git workflow (push -> pull -> restart -> health)
- docs/ Obsidian vault: per-service docs from frank-default-small research
  subagents (promtail EOL -> Alloy; gitea SECRET_KEY preservation; ComfyUI --cpu)
- bats test suite at 6 seams — 22 tests green

shared/prometheus/prometheus.yml

@@ -0,0 +1,56 @@
+# Prometheus configuration for the homelab.
+# Deployed to /opt/prometheus/config/prometheus.yml on Dankclaw.
+
+global:
+  scrape_interval: 15s
+  scrape_timeout: 10s
+  evaluation_interval: 15s
+
+scrape_configs:
+  # Prometheus itself
+  - job_name: "prometheus"
+    static_configs:
+      - targets: ["localhost:9090"]
+
+  # Host metrics — both hosts
+  - job_name: "node-dankclaw"
+    static_configs:
+      - targets: ["192.168.0.143:9100"]
+
+  - job_name: "node-dankserver"
+    static_configs:
+      - targets: ["192.168.0.235:9100"]
+
+  # Gitea metrics
+  - job_name: "gitea"
+    static_configs:
+      - targets: ["gitea:3000"]
+    metrics_path: "/metrics"
+
+  # Grafana metrics
+  - job_name: "grafana"
+    static_configs:
+      - targets: ["grafana:3000"]
+    metrics_path: "/metrics"
+
+  # Loki metrics
+  - job_name: "loki"
+    static_configs:
+      - targets: ["loki:3100"]
+    metrics_path: "/metrics"
+
+  # ComfyUI (no native /metrics; probe the UI)
+  - job_name: "comfyui"
+    metrics_path: "/"
+    static_configs:
+      - targets: ["comfyui:8188"]
+
+  # Blackbox-style probes for service up/down
+  - job_name: "services"
+    metrics_path: "/"
+    static_configs:
+      - targets:
+          - "http://search.dankclaw.local"
+          - "http://chat.dankclaw.local"
+          - "http://gitea.dankclaw.local"
+          - "http://comfyui.dankclaw.local"