Fix: Update authentik Caddy template to use HTTP backend

- Change reverse_proxy from https:// to http:// backend
- Use authentik_http_port instead of authentik_https_port
- Remove unnecessary TLS transport configuration
- Remove health check for non-existent endpoint

This aligns the Ansible template with the working configuration
where authentik only serves HTTP internally and Caddy handles SSL.

roles/valkey/defaults/main.yml

@@ -53,10 +53,6 @@ valkey_appendonly: false  # RDB only for simplicity
 # =================================================================
 # Security Configuration
 # =================================================================
-
-# Security hardening is now built into the custom service file
-
-# Valkey security settings
 valkey_timeout: 300
 valkey_tcp_keepalive: 300
 valkey_tcp_backlog: 511