feat: implement region-based QR code scanning for inbox documents

paperless-backend/src/scanner/scanner-watcher.service.ts

@@ -195,6 +195,7 @@ export class ScannerWatcherService implements OnModuleInit, OnModuleDestroy {
         OwnerUsername: owner,
         PageCount: 0,
         QrCodes: [],
+        IsScanned: false,
       });
       await this.documentRepo.save(doc);