API Rate Limiting and Security Enhancement

Implement comprehensive API security measures including rate limiting and abuse prevention.

Tasks: Set up API rate limiting with tiered limits for different endpoints Implement API key management and authentication system Create API request logging and monitoring system Set up API abuse detection and automatic blocking Implement API request validation and sanitization Create API security headers and CORS configuration Set up API documentation with security guidelines Implement API versioning and deprecation management Create API testing and security audit tools Set up API performance monitoring and optimization

Acceptance Criteria: API is protected against common security vulnerabilities Rate limiting prevents abuse while allowing legitimate usage API performance remains optimal under various load conditions Security measures are transparent and well-documented API monitoring provides insights for continuous improvement