Initial Ansible automation for hobbs.farm infrastructure

Complete IaC covering:
- 14 roles: common, docker, traefik, vaultwarden, monitoring, media, matrix,
  home_assistant, frigate, adguard, gitea, semaphore, openclaw, security, backup
- Inventory for all hosts (Peggy, Bart, Yoda, NAS, Firewalla)
- Stack playbooks: core-infrastructure, monitoring, media, communication,
  automation, smarthome, security-hardening
- Maintenance playbooks: update-containers, backup, health-check
- Production Docker Compose templates with Traefik labels
- Security hardening (sysctl, auditd, UFW, fail2ban)
- Automated backups with retention policy

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

@@ -0,0 +1,24 @@
+services:
+  vaultwarden:
+    image: {{ vaultwarden_image }}
+    container_name: vaultwarden
+    restart: unless-stopped
+    environment:
+      ADMIN_TOKEN: {{ vaultwarden_admin_token }}
+      SIGNUPS_ALLOWED: "{{ vaultwarden_signups_allowed | lower }}"
+      DOMAIN: "https://{{ vaultwarden_host }}"
+      WEBSOCKET_ENABLED: "true"
+    volumes:
+      - {{ vaultwarden_data_dir }}:/data
+    labels:
+      traefik.enable: "true"
+      traefik.http.routers.vaultwarden.rule: "Host(`{{ vaultwarden_host }}`)"
+      traefik.http.routers.vaultwarden.entrypoints: websecure
+      traefik.http.routers.vaultwarden.tls.certresolver: cloudflare
+      traefik.http.services.vaultwarden.loadbalancer.server.port: "80"
+    networks:
+      - {{ docker_network_name }}
+
+networks:
+  {{ docker_network_name }}:
+    external: true