fix: crash on zip download if zip is larger than 4GB (#709)

backend/src/file/file.controller.ts

@@ -54,13 +54,14 @@ export class FileController {
     @Res({ passthrough: true }) res: Response,
     @Param("shareId") shareId: string,
   ) {
-    const zip = await this.fileService.getZip(shareId);
+    const zipStream = this.fileService.getZip(shareId);
+  
     res.set({
       "Content-Type": "application/zip",
       "Content-Disposition": contentDisposition(`${shareId}.zip`),
     });
 
-    return new StreamableFile(zip);
+    return new StreamableFile(zipStream);
   }
 
   @Get(":fileId")