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.

frontend/src/App.tsx

@@ -68,21 +68,22 @@ function App(): JSX.Element {
     [data]
   );
 
-  const routeComputation = useMemo(() => {
-    const core = computeRoute({
-      startId: routeSelection.startId,
-      endId: routeSelection.endId,
-      stationById,
-      adjacency: trackAdjacency,
-    });
+  const routeComputation = useMemo(
+    () =>
+      computeRoute({
+        startId: routeSelection.startId,
+        endId: routeSelection.endId,
+        stationById,
+        adjacency: trackAdjacency,
+      }),
+    [routeSelection, stationById, trackAdjacency]
+  );
 
-    const segments = core.stations ? buildSegmentsFromStations(core.stations) : [];
-
-    return {
-      ...core,
-      segments,
-    };
-  }, [routeSelection, stationById, trackAdjacency]);
+  const routeSegments = useMemo<LatLngExpression[][]>(() => {
+    return routeComputation.segments.map((segment) =>
+      segment.map((pair) => [pair[0], pair[1]] as LatLngExpression)
+    );
+  }, [routeComputation.segments]);
 
   const focusedStation = useMemo(() => {
     if (!data || !focusedStationId) {
@@ -144,7 +145,7 @@ function App(): JSX.Element {
                     focusedStationId={focusedStationId}
                     startStationId={routeSelection.startId}
                     endStationId={routeSelection.endId}
-                    routeSegments={routeComputation.segments}
+                    routeSegments={routeSegments}
                     onStationClick={handleStationSelection}
                   />
                 </div>
@@ -267,7 +268,9 @@ function App(): JSX.Element {
                       {data.tracks.map((track) => (
                         <li key={track.id}>
                           {track.startStationId} → {track.endStationId} ·{' '}
-                          {(track.lengthMeters / 1000).toFixed(1)} km
+                          {track.lengthMeters > 0
+                            ? `${(track.lengthMeters / 1000).toFixed(1)} km`
+                            : 'N/A'}
                         </li>
                       ))}
                     </ul>
@@ -329,16 +332,3 @@ export default App;
 function hasStation(stations: Station[], id: string): boolean {
   return stations.some((station) => station.id === id);
 }
-
-function buildSegmentsFromStations(stations: Station[]): LatLngExpression[][] {
-  const segments: LatLngExpression[][] = [];
-  for (let index = 0; index < stations.length - 1; index += 1) {
-    const current = stations[index];
-    const next = stations[index + 1];
-    segments.push([
-      [current.latitude, current.longitude],
-      [next.latitude, next.longitude],
-    ]);
-  }
-  return segments;
-}