Add stack-type labels and public service stacks

Add com.ghost.tel/stack-type labels to all stacks:
- prod (17): Production services from core
- dev-only (11): Experimental/device-specific services
- public (8): Public-facing services (uplink.tel, sequela.tel)

New public stacks from docker-public:
- nitter-public: Nitter instance for uplink.tel
- freshrss-public: FreshRSS for uplink.tel
- rsshub-public: RSSHub for uplink.tel
- searx-public: SearXNG for uplink.tel
- wikijs-public: Wiki.js for sequela.tel
- matomo-public: Matomo analytics for sequela.tel

Also fixes:
- Remove obsolete 'version' key from compose files
- Fix snowflake to remove duplicate watchtower service
- Standardize compose file formatting

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

stacks/matomo-public/docker-compose.yml

@@ -0,0 +1,50 @@
+services:
+  db:
+    image: mariadb:latest
+    container_name: matomo-db
+    restart: unless-stopped
+    labels:
+      - "com.ghost.tel/stack-type=public"
+    command: --max-allowed-packet=64MB
+    environment:
+      MYSQL_ROOT_PASSWORD: ${MATOMO_MYSQL_ROOT_PASSWORD}
+      MYSQL_DATABASE: matomo
+      MYSQL_USER: matomo
+      MYSQL_PASSWORD: ${MATOMO_MYSQL_PASSWORD}
+    volumes:
+      - ./mysql:/var/lib/mysql
+
+  app:
+    image: matomo:latest
+    container_name: matomo
+    restart: unless-stopped
+    labels:
+      - "com.ghost.tel/stack-type=public"
+      - "traefik.enable=true"
+      - "traefik.http.routers.matomo.entrypoints=https"
+      - "traefik.http.routers.matomo.rule=Host(`matomo.sequela.tel`) || Host(`matomo.sequela.uk`)"
+      - "traefik.http.routers.matomo.tls.certresolver=http"
+      - "traefik.http.services.matomo.loadbalancer.server.port=80"
+    environment:
+      MATOMO_DATABASE_HOST: db
+      MATOMO_DATABASE_ADAPTER: mysql
+      MATOMO_DATABASE_TABLES_PREFIX: matomo_
+      MATOMO_DATABASE_USERNAME: matomo
+      MATOMO_DATABASE_PASSWORD: ${MATOMO_MYSQL_PASSWORD}
+      MATOMO_DATABASE_DBNAME: matomo
+    volumes:
+      - matomo-data:/var/www/html
+    expose:
+      - "80"
+    depends_on:
+      - db
+    networks:
+      - web
+      - default
+
+volumes:
+  matomo-data:
+
+networks:
+  web:
+    external: true