Implement Comprehensive Error Handling

[underscorekadji]

Problem Description

Error handling is currently inconsistent across the application with varying error formats, insufficient logging, and poor error recovery mechanisms. We need to implement a comprehensive error handling system for better reliability and debugging.

Acceptance Criteria

• Create standardized error classes and error hierarchy
• Implement global error handling middleware for API routes
• Add structured error logging with correlation IDs
• Create error recovery and retry mechanisms
• Implement error monitoring and alerting
• Add user-friendly error messages and error codes
• Create error handling documentation and best practices
• Add comprehensive error handling tests

Technical Details

• Create AppError base class with error codes and severity levels
• Implement domain-specific error classes (ValidationError, NotFoundError, etc.)
• Add global error handler middleware for consistent error responses
• Create structured logging with correlation IDs and error context
• Implement retry mechanisms for transient errors
• Add error monitoring integration (logging, metrics)
• Create error response formatting with user-friendly messages
• Implement error boundary patterns for better error isolation

Estimate: 4 story points

This will improve application reliability and provide better debugging capabilities.