Disable xet by default. Seems to be causing a lot of hanging issues.

run.py

@@ -4,6 +4,8 @@ from dotenv import load_dotenv
 # Load the .env file if it exists
 load_dotenv()
 os.environ["HF_HUB_ENABLE_HF_TRANSFER"] = os.getenv("HF_HUB_ENABLE_HF_TRANSFER", "1")
+# the hf-xet download backend stalls forever mid-download (no timeout); force plain HTTP
+os.environ["HF_HUB_DISABLE_XET"] = os.getenv("HF_HUB_DISABLE_XET", "1")
 os.environ["NO_ALBUMENTATIONS_UPDATE"] = "1"
 seed = None
 if "SEED" in os.environ: