Implement Critical Gateway Improvements - Memory Management, Range Caching, and Content Claims Integration

[sujalsalekar]

This PR implements three major improvements to enhance the gateway's performance, reliability, and security:

🔒 Content Claims Service Integration

• Added robust error categorization and sanitization
• Implemented retry mechanism with configurable options
• Enhanced error logging with proper context
• Added secure error message sanitization
• Improved service resilience with proper error handling

💾 Memory Management System

• Implemented configurable memory budgeting
• Added real-time memory usage tracking
• Implemented automatic resource cleanup
• Added memory usage monitoring via response headers
• Protected against memory exhaustion attacks

📦 Range Request Cache Optimization

• Implemented efficient chunk-based caching
• Added smart caching for popular ranges
• Improved partial content request handling
• Added proper HTTP range header support
• Implemented background chunk caching
• Added cache TTL management (1 hour)

🔄 Middleware Chain Reorganization

• Optimized middleware execution order
• Improved security checks positioning
• Enhanced performance by early resource validation
• Better separation of concerns