simplify pulsenode dashboard: one Services group, no db/search/discovery

Trims the deployed config down to what's actually useful day-to-day:
a single Services group with the 10 stacks as plain docker widgets
(traefik, coolify, gitea, code, immich, n8n, passbolt, umami,
headscale, mailpit). Drops the Data Services group (8 database
widgets), the Search widget, and auto-discovery (and the synthetic
Discovered group it produced) - all still fully supported by the app
itself and demonstrated in the pulsenode repo's own dogfood config,
just more than this deployment needs.

pulsenode/config/config.yml

@@ -4,17 +4,8 @@ settings:
 theme:
   mode: dark
 
-# 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
+  - name: Services
     widgets:
       - type: docker
         name: Traefik
@@ -32,8 +23,6 @@ groups:
         href: https://${TRAEFIK_HOST_COOLIFY}
         interval: 10s
 
-  - name: Dev Tools
-    widgets:
       - type: docker
         name: Gitea
         containerName: gitea
@@ -41,21 +30,12 @@ groups:
         href: https://${TRAEFIK_HOST_GITEA}
         interval: 10s
 
-      - type: docker
-        name: Gitea Runner
-        containerName: gitea_runner
-        icon: gitea
-        showStats: true
-        interval: 15s
-
       - type: docker
         name: Code Server
         containerName: code
         href: https://${TRAEFIK_HOST_CODE}
         interval: 10s
 
-  - name: Apps
-    widgets:
       - type: docker
         name: Immich
         containerName: immich
@@ -63,12 +43,6 @@ groups:
         href: https://${TRAEFIK_HOST_IMMICH}
         interval: 10s
 
-      - type: docker
-        name: Immich ML
-        containerName: immich_ml
-        icon: immich
-        interval: 15s
-
       - type: docker
         name: n8n
         containerName: n8n
@@ -101,58 +75,3 @@ groups:
         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:
-      - type: search
-        engines: [duckduckgo, google]