fix: resolve RedisCache array offset error and improve discovery diagnostics

- Fix RedisCache driver to handle MGET failures gracefully with fallback
- Add comprehensive discovery context comparison debug tools
- Identify root cause: WEB context discovery missing 166 items vs CLI
- WEB context missing RequestFactory class entirely (52 vs 69 commands)
- Improved exception handling with detailed binding diagnostics

deployment/infrastructure/roles/nginx-proxy/vars/Debian.yml

@@ -0,0 +1,37 @@
+---
+# OS-specific variables for Debian/Ubuntu systems
+
+# Nginx package and service names
+nginx_package: nginx
+nginx_service: nginx
+nginx_user: www-data
+nginx_group: www-data
+
+# System paths
+nginx_conf_path: /etc/nginx/nginx.conf
+nginx_sites_available_path: /etc/nginx/sites-available
+nginx_sites_enabled_path: /etc/nginx/sites-enabled
+nginx_conf_d_path: /etc/nginx/conf.d
+nginx_log_path: /var/log/nginx
+nginx_pid_file: /run/nginx.pid
+
+# SSL paths
+ssl_cert_path: /etc/ssl/certs
+ssl_private_path: /etc/ssl/private
+dhparam_path: /etc/ssl/certs/dhparam.pem
+
+# Let's Encrypt paths
+certbot_package: certbot
+letsencrypt_path: /etc/letsencrypt
+letsencrypt_webroot_path: /var/www/letsencrypt
+
+# System packages
+nginx_dependencies:
+  - nginx
+  - certbot
+  - python3-certbot-nginx
+  - openssl
+  - python3-openssl
+
+# PHP-FPM socket path (if needed)
+php_fpm_socket: unix:/run/php/php8.4-fpm.sock