feat: update documentation and infrastructure configuration

- Update service count from 22+ to 25 across documentation
- Add vault.yml to gitignore for security
- Add notifications configuration for AppriseAPI integration
- Add jq package to common role dependencies
- Add hairpin networking fix for AppriseAPI chat subdomain access
- Remove diun service references from monitoring category
- Update project completion status in todo.md

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

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

group_vars/all/infrastructure.yml

@@ -19,4 +19,8 @@ network:
 
 # Paths
 paths:
-  stacks: "{{ docker.stacks_path }}"
+  stacks: "{{ docker.stacks_path }}"
+
+# Notification services
+notifications:
+  appriseapi_endpoint: "http://apprise:8000/notify/apprise"