- Add Protocol enum to Mapping entity for HTTP, HTTPS, TCP, SSH
- Add TunnelsResponse and TunnelResult models for typed API responses
- Add ExternalServiceException for Cloudflare API errors
- Add approve and reject endpoints for mapping requests
- Add GET /requests endpoint with pagination and status filtering
- Refactor API paths to use 'configured' and 'configure' terminology
- Add comprehensive unit tests for all new endpoints
- Add service layer tests for new methods