- Add standardized ApiResponse interface with consistent structure
- Implement proper request validation with detailed error messages
- Add response metadata (version, timestamp, requestId, processingTime)
- Include proper HTTP status codes and error handling
- Add validation for pagination parameters (limit: 1-1000, offset: >=0)
- Add health status enum validation
- Include response headers (X-Request-ID, X-Processing-Time, Cache-Control)
- Improve error logging with structured context
- Add count field to pagination response
- Follow REST API industry standards and best practices
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