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

inventory/group_vars/all.yml

@@ -0,0 +1,45 @@
+---
+# Global variables for hobbs.farm
+domain: hobbs.farm
+timezone: America/Chicago
+dns_server: 192.168.86.45
+gateway: 192.168.86.1
+nas_ip: 192.168.86.30
+nas_share: "//192.168.86.30/data"
+
+# SSH
+ansible_user: glyptic
+ansible_ssh_private_key_file: ~/.ssh/id_docker_server
+ansible_python_interpreter: /usr/bin/python3
+
+# Docker network
+docker_network_name: homelab_network
+
+# Traefik
+traefik_acme_email: "{{ vault_acme_email }}"
+cloudflare_api_token: "{{ vault_cloudflare_api_token }}"
+
+# NAS mounts
+nas_media_path: /mnt/nas/media
+nas_backup_path: /mnt/nas/backups
+nas_docker_path: /mnt/nas/docker
+
+# Common packages
+common_packages:
+  - htop
+  - iotop
+  - curl
+  - wget
+  - git
+  - jq
+  - unzip
+  - net-tools
+  - ncdu
+  - tmux
+  - rsync
+  - lsof
+
+# NTP
+ntp_servers:
+  - 0.us.pool.ntp.org
+  - 1.us.pool.ntp.org