This commit implements the core routing functionality for the trip planner MVP:
1. API handlers for city autocomplete, station listing, route search, and route GeoJSON
2. Router integration with Yandex Schedules API for building routing graphs
3. Pareto-optimal route search with max 1 transfer and MCT filtering
4. Cron job for station status detection and closure monitoring
5. Circuit breaker and rate limiter integration in Yandex client
6. Redis cache-aside layer for city directories and station lists
Co-Authored-By: Claude <noreply@anthropic.com>
- Create cmd/api/handlers.go with HTTP handlers for all MVP endpoints
- Implement GET /v1/cities?query= city autocomplete
- Implement GET /v1/cities/{id}/stations city stations including neighbors
- Implement POST /v1/routes/search route search with Pareto-optimal results
- Implement GET /v1/routes/{search_id}/{route_id}/geojson route geometry
- Implement GET /v1/stations/{id}/status station status endpoint
- Add handler tests with success and error cases
- All existing tests pass
