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/common/tasks/main.yml

@@ -1,6 +1,8 @@
-- name: Install aptitude
+- name: Install common packages
   apt:
-    name: aptitude
+    name: 
+      - aptitude
+      - jq
     state: latest
     update_cache: true