chore: freeze guide and explain update

src/repositories/GuideRepository.ts

@@ -1,5 +1,6 @@
 import type {
   GuideLocationPreview,
+  GuideRouteReadiness,
   MuseumFloor,
   MuseumPoi
 } from '@/domain/museum'
@@ -57,7 +58,7 @@ export interface GuideRepository {
   getPoiById(id: string): Promise<MuseumPoi | null>
   searchPois(keyword?: string): Promise<MuseumPoi[]>
   getLocationPreview(poiId: string): Promise<GuideLocationPreview | null>
-  getRouteReadiness(): typeof NAV_ROUTE_READINESS
+  getRouteReadiness(): Promise<GuideRouteReadiness>
 }
 
 export class StaticGuideRepository implements GuideRepository {
@@ -114,8 +115,9 @@ export class StaticGuideRepository implements GuideRepository {
     return poi ? toLocationPreview(poi) : null
   }
 
-  getRouteReadiness() {
-    return NAV_ROUTE_READINESS
+  async getRouteReadiness() {
+    return this.provider.loadRouteReadiness()
+      .catch(() => NAV_ROUTE_READINESS)
   }
 }