feat: add Gotify notification server with iGotify iOS support

Add comprehensive push notification infrastructure with:
- Gotify server for push notifications with admin password configuration
- iGotify Assistant service for iOS notification relay via Apple Push Notifications
- Dual subdomain setup (gotify.* and gotify-assistant.*)
- Proper service dependencies and container communication via hairpinning
- Caddy reverse proxy configuration for both services
- DNS A records for both subdomains
- Added to monitoring services category
- Tested with successful notification delivery

Services accessible at:
- https://gotify.thesatelliteoflove.com (main server)
- https://gotify-assistant.thesatelliteoflove.com (iOS assistant)

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

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

roles/docker/tasks/monitoring/main.yml

@@ -11,4 +11,8 @@
 
 - name: Install appriseapi
   import_tasks: appriseapi.yml 
-  tags: appriseapi
+  tags: appriseapi
+
+- name: Install gotify
+  import_tasks: gotify.yml
+  tags: gotify