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/semaphore/defaults/main.yml

@@ -0,0 +1,6 @@
+---
+semaphore_compose_dir: "{{ docker_compose_base }}/automation"
+semaphore_data_dir: /data/semaphore
+semaphore_image: "semaphoreui/semaphore:latest"
+semaphore_host: "semaphore.{{ domain }}"
+semaphore_db_password: "{{ vault_semaphore_db_password }}"

roles/semaphore/tasks/main.yml

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+---
+- name: Create Semaphore directories
+  ansible.builtin.file:
+    path: "{{ item }}"
+    state: directory
+    owner: glyptic
+    group: docker
+    mode: "0755"
+  loop:
+    - "{{ semaphore_data_dir }}"
+  tags: [semaphore, automation]
+
+- name: Deploy Semaphore compose file
+  ansible.builtin.template:
+    src: docker-compose.yml.j2
+    dest: "{{ semaphore_compose_dir }}/docker-compose.semaphore.yml"
+    owner: glyptic
+    group: docker
+    mode: "0644"
+  tags: [semaphore, automation]
+
+- name: Start Semaphore
+  community.docker.docker_compose_v2:
+    project_src: "{{ semaphore_compose_dir }}"
+    files:
+      - docker-compose.semaphore.yml
+    state: present
+  tags: [semaphore, automation]

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

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+services:
+  semaphore:
+    image: {{ semaphore_image }}
+    container_name: semaphore
+    restart: unless-stopped
+    environment:
+      SEMAPHORE_DB_DIALECT: bolt
+      SEMAPHORE_ADMIN_PASSWORD: "{{ vault_semaphore_admin_password | default('changeme') }}"
+      SEMAPHORE_ADMIN_NAME: admin
+      SEMAPHORE_ADMIN_EMAIL: admin@{{ domain }}
+      SEMAPHORE_ADMIN: admin
+      SEMAPHORE_ACCESS_KEY_ENCRYPTION: "{{ vault_semaphore_encryption_key | default('generate-a-key') }}"
+    volumes:
+      - {{ semaphore_data_dir }}:/tmp/semaphore
+    labels:
+      traefik.enable: "true"
+      traefik.http.routers.semaphore.rule: "Host(`{{ semaphore_host }}`)"
+      traefik.http.routers.semaphore.entrypoints: websecure
+      traefik.http.routers.semaphore.tls.certresolver: cloudflare
+      traefik.http.services.semaphore.loadbalancer.server.port: "3000"
+    networks:
+      - {{ docker_network_name }}
+
+networks:
+  {{ docker_network_name }}:
+    external: true