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

roles/authentik/templates/authentik.pod.j2

@@ -0,0 +1,21 @@
+# Authentik Pod Quadlet
+# Generated by rick-infra Ansible role
+
+[Unit]
+Description=Authentik Authentication Service Pod
+Wants=network-online.target
+After=network-online.target
+
+[Pod]
+PodName={{ authentik_pod_name }}
+Network={{ authentik_network_name }}
+{% if authentik_enable_host_gateway | default(true) %}
+AddHost=host.containers.internal:host-gateway
+{% endif %}
+
+# Published ports for web access
+PublishPort={{ authentik_http_port }}:9000
+PublishPort={{ authentik_https_port }}:9443
+
+[Install]
+WantedBy=default.target