Advanced API Routes

[kenako1]

User Story Description
As a developer
I want to implement optimized API endpoints for data retrieval
So that the application loads faster and uses server resources more efficiently

Acceptance Criteria:

• API endpoints return only requested data fields
• Pagination implemented for large result sets
• Response times are measurably improved
• API follows RESTful best practices

Definition of Done:

• API documentation generated (Swagger/OpenAPI)
• Field selection parameter working (e.g., ?fields=name,location)
• Pagination implemented with page and limit parameters
• Response time improved by at least 30% (benchmarked)
• Rate limiting implemented
• API versioning strategy in place
• Error responses follow consistent format
• Integration tests written
• Load testing completed

Edge Cases:

• Invalid field names requested: Return error with valid field list
• Negative page numbers: Default to page 1
• Page size exceeds maximum: Cap at reasonable limit (e.g., 100)
• Last page with fewer items: Handle gracefully
• Request for non-existent page: Return empty array with metadata
• Malformed query parameters: Validate and return 400 Bad Request
• API rate limit exceeded: Return 429 Too Many Requests with retry-after header
• Server overload: Implement circuit breaker pattern