Add Authentik SSO service and refactor Valkey configuration to use native tools and consolidated systemd service

roles/authentik/tasks/main.yml

@@ -0,0 +1,36 @@
+---
+# Authentik Authentication Service Role - Containerized Implementation
+# Manages Authentik using Podman with self-contained database
+
+- name: Create authentik user and configure subuid/subgid
+  include_tasks: user.yml
+
+- name: Set up authentik database
+  include_tasks: database.yml
+
+- name: Configure container networking
+  include_tasks: networking.yml
+
+- name: Deploy authentik containers via quadlets
+  include_tasks: containers.yml
+
+- name: Deploy Caddy configuration for Authentik
+  template:
+    src: authentik.caddy.j2
+    dest: "{{ caddy_sites_enabled_dir }}/authentik.caddy"
+    mode: '0644'
+  notify: reload caddy
+  when: caddy_sites_enabled_dir is defined
+
+- name: Display Authentik service status
+  debug:
+    msg: |
+      ✅ Authentik authentication service deployed successfully!
+      
+      🌐 Web Interface: https://{{ authentik_full_domain }}
+      🔐 Admin Interface: https://{{ authentik_full_domain }}/if/admin/
+      📦 Local HTTP: http://127.0.0.1:{{ authentik_http_port }}
+      🗄️  Database: {{ authentik_db_name }} (self-managed)
+      🚀 Cache: Valkey database {{ authentik_redis_db }}
+      
+      🏗️ Authentication service ready for SSO integration!