feat: dogfood config.yml against the real stacks repo

Replaces the placeholder bookmark links with real docker/database
widgets for every container in the 10 Projekte/stacks compose files
(traefik, coolify+redis+db, gitea+runner+db, code, immich+ml+redis+db,
n8n+db, passbolt+db, umami+db, headscale, mailpit) - the actual
"widgets for all services in Projekte/stacks" deliverable, not just an
example. Also turns on label-based discovery against falcon_network as
a safety net for anything added later without a config.yml update;
manual widgets here still take precedence for anything already listed.

Verified the config validates and renders with no schema errors, and
that a widget pointed at a container that doesn't exist in this
environment fails gracefully (a clean error result over the socket)
rather than crashing - expected here since none of the real stacks run
in this sandbox; wiring against the live falcon_network happens at
actual deploy time.

config/config.yml

@@ -6,57 +6,143 @@ theme:
   variables:
     --pn-accent: "#38bdf8"
 
+# Manual widgets below always take precedence over an auto-discovered one for
+# the same container - this is on as a safety net for anything added to
+# falcon_network later without a config.yml update, not to duplicate what's
+# already listed here. Requires DOCKER_GID set correctly (see .env.example).
+discovery:
+  docker:
+    enabled: true
+    network: falcon_network
+
 groups:
   - name: Core Infra
     widgets:
-      - type: bookmark
+      - type: docker
         name: Traefik
+        containerName: traefik
         href: https://${TRAEFIK_HOST_TRAEFIK}
-        description: Reverse proxy dashboard
+        interval: 10s
+        # Swap for a `traefik` widget (router/entrypoint/middleware view)
+        # once the API is enabled - see Traefik's --api.dashboard docs.
 
-      - type: bookmark
+      - type: docker
         name: Coolify
+        containerName: coolify
         href: https://${TRAEFIK_HOST_COOLIFY}
-        description: Deployment platform
+        interval: 10s
 
   - name: Dev Tools
     widgets:
-      - type: bookmark
+      - type: docker
         name: Gitea
+        containerName: gitea
         href: https://${TRAEFIK_HOST_GITEA}
-        description: Git hosting & CI
+        interval: 10s
 
-      - type: bookmark
+      - type: docker
+        name: Gitea Runner
+        containerName: gitea_runner
+        showStats: true
+        interval: 15s
+
+      - type: docker
         name: Code Server
+        containerName: code
         href: https://${TRAEFIK_HOST_CODE}
-        description: Browser IDE
+        interval: 10s
 
   - name: Apps
     widgets:
-      - type: bookmark
+      - type: docker
         name: Immich
+        containerName: immich
         href: https://${TRAEFIK_HOST_IMMICH}
-        description: Photo & video library
+        interval: 10s
 
-      - type: bookmark
+      - type: docker
+        name: Immich ML
+        containerName: immich_ml
+        interval: 15s
+
+      - type: docker
         name: n8n
+        containerName: n8n
         href: https://${TRAEFIK_HOST_N8N}
-        description: Workflow automation
+        interval: 10s
 
-      - type: bookmark
+      - type: docker
         name: Passbolt
+        containerName: passbolt
         href: https://${TRAEFIK_HOST_PASSBOLT}
-        description: Password manager
+        interval: 10s
 
-      - type: bookmark
+      - type: docker
         name: Umami
+        containerName: umami
         href: https://${TRAEFIK_HOST_UMAMI}
-        description: Web analytics
+        interval: 10s
 
-      - type: bookmark
+      - type: docker
         name: Headscale
+        containerName: headscale
         href: https://${TRAEFIK_HOST_HEADSCALE}
-        description: VPN mesh control
+        interval: 10s
+
+      - type: docker
+        name: Mailpit
+        containerName: mailpit
+        interval: 15s
+
+  - name: Data Services
+    widgets:
+      - type: database
+        name: Coolify DB
+        containerName: coolify_db
+        engine: postgres
+        interval: 20s
+
+      - type: database
+        name: Coolify Redis
+        containerName: coolify_redis
+        engine: redis
+        interval: 20s
+
+      - type: database
+        name: Gitea DB
+        containerName: gitea_db
+        engine: postgres
+        interval: 20s
+
+      - type: database
+        name: Immich DB
+        containerName: immich_db
+        engine: postgres
+        interval: 20s
+
+      - type: database
+        name: Immich Redis
+        containerName: immich_redis
+        engine: redis
+        interval: 20s
+
+      - type: database
+        name: n8n DB
+        containerName: n8n_db
+        engine: postgres
+        interval: 20s
+
+      - type: database
+        name: Passbolt DB
+        containerName: passbolt_db
+        engine: postgres
+        interval: 20s
+
+      - type: database
+        name: Umami DB
+        containerName: umami_db
+        engine: postgres
+        interval: 20s
 
   - name: Search
     widgets: