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/host_vars/peggy.yml

@@ -0,0 +1,37 @@
+---
+ansible_host: 192.168.86.45
+hostname: peggy
+hardware_description: "Intel i7-6700T, 8GB RAM"
+os: "Ubuntu 24.04"
+
+docker_compose_stacks:
+  - core-infrastructure
+  - infrastructure
+  - monitoring
+  - media
+  - automation
+  - communication
+  - smarthome
+
+# NAS mounts for Peggy
+nfs_mounts:
+  - src: "192.168.86.30:/volume1/media"
+    dest: /mnt/nas/media
+    fstype: nfs
+    opts: "rw,hard,intr,rsize=8192,wsize=8192"
+  - src: "192.168.86.30:/volume1/backups"
+    dest: /mnt/nas/backups
+    fstype: nfs
+    opts: "rw,hard,intr"
+
+# Backup paths
+backup_sources:
+  - /data/docker-compose
+  - /data/traefik
+  - /data/vaultwarden
+  - /data/grafana
+  - /data/prometheus
+  - /data/homeassistant
+  - /data/gitea
+
+backup_destination: /mnt/nas/backups/peggy