feat: complete variable management implementation and update documentation

- Update remaining Docker Compose templates with centralized variables
- Fix service tag isolation to deploy individual services only
- Update all README files with variable management architecture
- Document variable hierarchy in DEPLOYMENT_LEARNINGS.md
- Add comprehensive variable usage patterns to CLAUDE.md
- Standardize domain references using {{ subdomains.* }} pattern
- Replace hardcoded network names with {{ docker.network_name }}
- Update hairpinning configuration to use variables

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

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

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

@@ -2,7 +2,7 @@ services:
   apprise:
     container_name: apprise
     ports:
-      - 100.70.169.99:8000:8000
+      - {{ network.docker_host_ip }}:8000:8000
     environment:
       - APPRISE_STATEFUL_MODE=simple
       - APPRISE_WORKER_COUNT=1
@@ -14,7 +14,7 @@ services:
     labels:
       glance.name: Apprise
       glance.icon: si:imessage
-      glance.url: https://auth.thesatelliteoflove.com/
+      glance.url: https://{{ subdomains.appriseapi }}/
       glance.description: Apprise api server
       glance.id: apprise
     
@@ -25,4 +25,4 @@ volumes:
 networks:
   default:
     external: true
-    name: lava
+    name: {{ docker.network_name }}