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/dawarich-compose.yml.j2

@@ -10,7 +10,7 @@ services:
       - dawarich_db_data:/var/lib/postgresql/data
     environment:
       POSTGRES_USER: postgres
-      POSTGRES_PASSWORD: {{ dawarich_db_password }}
+      POSTGRES_PASSWORD: {{ vault_dawarich.postgres_password }}
       POSTGRES_DB: dawarich_production
     restart: always
     healthcheck:
@@ -25,7 +25,7 @@ services:
     labels:
       glance.name: Dawarich
       glance.icon: si:openstreetmap
-      glance.url: https://loclog.thesatelliteoflove.com/
+      glance.url: https://{{ subdomains.loclog }}/
       glance.description: Dawarich
       glance.id: dawarich
     volumes:
@@ -45,10 +45,10 @@ services:
       DATABASE_HOST: dawarich_db
       DATABASE_PORT: 5432
       DATABASE_USERNAME: postgres
-      DATABASE_PASSWORD: {{ dawarich_db_password }}
+      DATABASE_PASSWORD: {{ vault_dawarich.postgres_password }}
       DATABASE_NAME: dawarich_production
       MIN_MINUTES_SPENT_IN_CITY: 60
-      APPLICATION_HOSTS: loclog.thesatelliteoflove.com,localhost,::1,127.0.0.1
+      APPLICATION_HOSTS: {{ subdomains.loclog }},localhost,::1,127.0.0.1
       TIME_ZONE: America/Denver
       APPLICATION_PROTOCOL: http
       DISTANCE_UNIT: mi
@@ -85,4 +85,4 @@ volumes:
 networks:
   default:
     external: true
-    name: lava
+    name: {{ docker.network_name }}