feat: Enhance track model and import functionality

- Added new fields to TrackModel: status, is_bidirectional, and coordinates.
- Updated network service to handle new track attributes and geometry extraction.
- Introduced CLI scripts for importing and loading tracks from OpenStreetMap.
- Implemented normalization of track elements to ensure valid geometries.
- Enhanced tests for track model, network service, and import/load scripts.
- Updated frontend to accommodate new track attributes and improve route computation.
- Documented OSM ingestion process in architecture and runtime views.

TODO.md

@@ -17,9 +17,9 @@
 - [x] Implement an import script/CLI that pulls OSM station data and normalizes it to the PostGIS schema.
 - [x] Expose backend CRUD endpoints for stations (create, update, archive) with validation and geometry handling.
 - [x] Build React map tooling for selecting a station.
-- [ ] Enhance map UI to support selecting two stations and previewing the rail corridor between them.
-- [ ] Define track selection criteria and tagging rules for harvesting OSM rail segments within target regions.
-- [ ] Extend the importer to load track geometries and associate them with existing stations.
+- [x] Enhance map UI to support selecting two stations and previewing the rail corridor between them.
+- [x] Define track selection criteria and tagging rules for harvesting OSM rail segments within target regions.
+- [x] Extend the importer to load track geometries and associate them with existing stations.
 - [ ] Implement backend track-management APIs with length/speed validation and topology checks.
 - [ ] Implement track path mapping along existing OSM rail segments between chosen stations.
 - [ ] Design train connection manager requirements (link trains to operating tracks, manage consist data).