API Error Handling

Implement robust error handling with standardized responses and proper logging.

Standard Error Response Format

{
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters",
    "status": 400,
    "requestId": "req_abc123",
    "timestamp": "2025-01-15T10:30:00Z",
    "details": [
      { "field": "email", "message": "Invalid email format" }
    ]
  }
}