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>

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

@@ -11,6 +11,8 @@ services:
       - plugin:/plugin
       - attach:/attach
     image: caronc/apprise:latest
+    extra_hosts:
+      - "{{ subdomains.chat }}:{{ docker.hairpin_ip }}"
     labels:
       glance.name: Apprise
       glance.icon: si:imessage