Take TTC vehicle mode from the fleet number before the route

Replacement buses on 5xx streetcar routes were drawn as streetcars, and
Flexity streetcars reporting no route were drawn as buses. A feed can now
supply vehicleMode(id); TTC maps 4400-4699 to streetcars and every other
fleet number to buses, falling back to the route otherwise.

src/sources/transitHistoryStore.js

@@ -328,8 +328,12 @@ export function createTransitHistory({
           t > now + 10000
         )
           continue;
+        const byVehicle = feed.vehicleMode?.(record.id);
         const mode =
-          feed.routeMode?.(record.routeId) || feed.defaultMode || 'unknown';
+          (byVehicle !== 'unknown' && byVehicle) ||
+          feed.routeMode?.(record.routeId) ||
+          feed.defaultMode ||
+          'unknown';
         const context = contextOf(record, mode);
         if (!context) continue;
         const key = `${feed.id}\u0000${record.id}`;