feat: add Grocy kitchen ERP service

- Add grocy subdomain to domains.yml
- Create Docker Compose template using LinuxServer image
- Add Ansible task for service deployment
- Configure Caddy reverse proxy with Authentik auth and API bypass
- Add DNS record for grocy subdomain
- Integrate with productivity services category

🤖 Generated with [Claude Code](https://claude.ai/code)

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

roles/docker/templates/grocy-compose.yml.j2

@@ -0,0 +1,30 @@
+services:
+  grocy:
+    image: lscr.io/linuxserver/grocy:latest
+    container_name: grocy
+    restart: unless-stopped
+    environment:
+      - PUID=1000
+      - PGID=1000
+      - TZ=America/Denver
+    volumes:
+      - ./config:/config
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+      - "{{ subdomains.auth }}:{{ docker.hairpin_ip }}"
+    labels:
+      glance.name: Grocy
+      glance.icon: si:grocyapp
+      glance.url: https://{{ subdomains.grocy }}/
+      glance.description: Kitchen ERP and inventory management
+      glance.id: grocy
+      mag37.dockcheck.update: true
+
+volumes:
+  grocy_config:
+    driver: local
+
+networks:
+  default:
+    external: true
+    name: {{ docker.network_name }}