feat: implement comprehensive variable management system

- Create standardized group_vars directory structure
- Add domains.yml with centralized subdomain mappings
- Add infrastructure.yml with network, SMTP, and path config
- Reorganize vault.yml secrets by service with consistent naming
- Update 15+ Docker compose templates to use new variable structure
- Simplify playbook commands by removing --extra-vars requirement
- Replace hardcoded domains/IPs with template variables
- Standardize secret references across all services

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

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

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

@@ -8,16 +8,16 @@ services:
       - /var/run/docker.sock:/var/run/docker.sock
     restart: unless-stopped
     extra_hosts:
-      - 'thesatelliteoflove.com:172.20.0.5'
-      - 'watcher.thesatelliteoflove.com:172.20.0.5'
+      - '{{ primary_domain }}:172.20.0.5'
+      - '{{ subdomains.watcher }}:172.20.0.5'
     labels:
       glance.name: Glance
       glance.icon: si:homepage
-      glance.url: https://home.thesatelliteoflove.com/
+      glance.url: https://{{ subdomains.home }}/
       glance.description: Homepage app
       glance.id: glance
 
 networks:
   default:
     external: true
-    name: lava
+    name: {{ docker.network_name }}