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

roles/gitea/tasks/main.yml

@@ -7,7 +7,7 @@
     name: gitea
     state: present
 
-- name: Install Git (required for Gitea)
+- name: Install Git 
   pacman:
     name: git
     state: present
@@ -111,4 +111,4 @@
       📦 Local HTTP: http://127.0.0.1:{{ gitea_http_port }}
       🗄️  Database: {{ gitea_db_name }} (self-managed)
       
-      🏗️ Self-contained service ready for Git repositories!
+      🏗️ Self-contained service ready for Git repositories!