Add Valkey infrastructure role as Redis-compatible cache service

- Implemented complete Valkey infrastructure role following PostgreSQL patterns
- Provides 100% Redis-compatible high-performance data structure store
- Configured for multi-application support with database isolation
- Security-focused: localhost-only binding, password auth, systemd hardening
- Arch Linux compatible: uses native Valkey package with Redis compatibility
- Database allocation strategy: DB 0 reserved, DB 1+ for applications
- Full systemd integration with security overrides and proper service management
- Redis client compatibility maintained for seamless application integration
- Ready for Authentik and future container workloads requiring cache services

host_vars/arch-vps/main.yml

@@ -24,17 +24,6 @@ caddy_acme_ca: "https://acme-v02.api.letsencrypt.org/directory"
 caddy_api_enabled: true
 caddy_server_name: "main"
 
-# Static site configuration is deprecated - use API registration instead
-# Services should use the registration handlers:
-#
-# Example service registration pattern:
-# - name: Register my service
-#   set_fact:
-#     service_name: "myapi"
-#     service_domain: "api.jnss.me"
-#     service_backend: "localhost:8080"
-#   notify: register service with caddy
-
 # =================================================================
 # Sigvild Gallery Configuration
 # =================================================================