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

roles/authentik/tasks/networking.yml

@@ -0,0 +1,23 @@
+---
+# Authentik Container Networking - Bridge Network Setup
+
+- name: Create authentik bridge network
+  containers.podman.podman_network:
+    name: "{{ authentik_network_name }}"
+    driver: bridge
+    internal: false
+    state: present
+  become: yes
+  become_user: "{{ authentik_user }}"
+
+- name: Check if authentik network exists
+  command: podman network ls --format json
+  become: yes
+  become_user: "{{ authentik_user }}"
+  register: network_list
+  changed_when: false
+
+- name: Ensure host gateway is available in network
+  debug:
+    msg: "Network {{ authentik_network_name }} configured for host.containers.internal access"
+  when: authentik_enable_host_gateway | default(true)