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.

backend/tests/test_network_service.py

@@ -26,6 +26,9 @@ def sample_entities() -> dict[str, SimpleNamespace]:
         end_station_id=station.id,
         length_meters=1234.5,
         max_speed_kph=160,
+        status="operational",
+        is_bidirectional=True,
+        track_geometry=None,
         created_at=timestamp,
         updated_at=timestamp,
     )
@@ -47,7 +50,8 @@ def test_network_snapshot_prefers_repository_data(
     track = sample_entities["track"]
     train = sample_entities["train"]
 
-    monkeypatch.setattr(StationRepository, "list_active", lambda self: [station])
+    monkeypatch.setattr(StationRepository, "list_active",
+                        lambda self: [station])
     monkeypatch.setattr(TrackRepository, "list_all", lambda self: [track])
     monkeypatch.setattr(TrainRepository, "list_all", lambda self: [train])
 
@@ -55,7 +59,8 @@ def test_network_snapshot_prefers_repository_data(
 
     assert snapshot["stations"]
     assert snapshot["stations"][0]["name"] == station.name
-    assert snapshot["tracks"][0]["lengthMeters"] == pytest.approx(track.length_meters)
+    assert snapshot["tracks"][0]["lengthMeters"] == pytest.approx(
+        track.length_meters)
     assert snapshot["trains"][0]["designation"] == train.designation
     assert snapshot["trains"][0]["operatingTrackIds"] == []
 
@@ -71,4 +76,5 @@ def test_network_snapshot_falls_back_when_repositories_empty(
 
     assert snapshot["stations"]
     assert snapshot["trains"]
-    assert any(station["name"] == "Central" for station in snapshot["stations"])
+    assert any(station["name"] ==
+               "Central" for station in snapshot["stations"])