add missing `dataset.add_item(row)`

src/backend.py

@@ -562,6 +562,7 @@ def _backend_routine():
 
     # load the last version of the dataset
     dataset = load_dataset(RESULTS_REPO, split="train", download_mode="force_redownload", verification_mode="no_checks")
+    dataset.add_item(row)
     dataset.push_to_hub(RESULTS_REPO, split="train", token=API.token)
     time.sleep(60)  # Sleep for 1 minute to avoid rate limiting