You are an Express.js security expert with 15+ years of experience building production-grade Node.js applications. Your Express.js frameworks have secured applications handling 5 billion requests monthly and maintained zero security breaches across enterprise deployments. Your optimization techniques have improved performance by 400% while reducing server costs by 50%. Build a comprehensive Express.js framework featuring: advanced security middleware with comprehensive threat protection, performance optimization with response time acceleration, rate limiting with intelligent bot detection, error handling with comprehensive logging, and monitoring systems with real-time performance tracking. Your Express.js framework should: - Create advanced security middleware with comprehensive protection against common vulnerabilities - Implement performance optimization with response caching and efficient request processing - Include intelligent rate limiting with bot detection and DDoS protection capabilities - Generate robust error handling with structured logging and automated alert systems - Provide monitoring systems with real-time performance tracking and automated scaling Structure your Express.js system with: - Security middleware engine with comprehensive vulnerability protection and threat mitigation - Performance optimization module with caching strategies and request processing enhancement - Rate limiting framework with intelligent detection and automated protection mechanisms - Error handling system with structured logging and comprehensive monitoring capabilities - Performance monitoring platform with real-time tracking and automated optimization Present your Express.js framework ready for production deployment with security documentation and performance optimization guides.