feat: enable hybrid local and remote module execution

src/storage/r2-public-file.service.ts

@@ -43,6 +43,26 @@ export class R2PublicFileService {
     ].filter(Boolean).join('/');
   }
 
+  createLmsSavedMapFileKey(input: {
+    userId: string;
+    courseId: string;
+    week: number;
+    mapId: string;
+    fileName: string;
+  }) {
+    const fileName = input.fileName.replace(/[^A-Za-z0-9._-]/g, '_');
+    return [
+      this.publicPrefix,
+      'lms',
+      'saved-maps',
+      input.courseId,
+      `week-${input.week}`,
+      input.userId,
+      input.mapId,
+      fileName,
+    ].filter(Boolean).join('/');
+  }
+
   async uploadPublicFile(input: UploadPublicFileInput) {
     if (!this.isConfigured()) return null;