Add comprehensive authentik documentation and improve role configuration

- Add authentik-deployment-guide.md: Complete step-by-step deployment guide
- Add architecture-decisions.md: Document native DB vs containerized rationale
- Add authentication-architecture.md: SSO strategy and integration patterns
- Update deployment-guide.md: Integrate authentik deployment procedures
- Update security-hardening.md: Add multi-layer security documentation
- Update service-integration-guide.md: Add authentik integration examples
- Update README.md: Professional project overview with architecture benefits
- Update authentik role: Fix HTTP binding, add security configs, improve templates
- Remove unused authentik task files: containers.yml, networking.yml

Key improvements:
* Document security benefits of native databases over containers
* Document Unix socket IPC architecture advantages
* Provide comprehensive troubleshooting and deployment procedures
* Add forward auth integration patterns for services
* Fix authentik HTTP binding from 127.0.0.1 to 0.0.0.0
* Add shared memory and IPC security configurations

site.yml

@@ -19,9 +19,9 @@
     #   tags: ['caddy', 'infrastructure', 'web']
     
     # Application services  
-    - role: sigvild-gallery
-      tags: ['sigvild', 'gallery', 'wedding']
-    - role: authentik
-      tags: ['authentik']
+    # - role: sigvild-gallery
+    #   tags: ['sigvild', 'gallery', 'wedding']
     - role: gitea
       tags: ['gitea', 'git', 'development']
+    - role: authentik
+      tags: ['authentik']