fix cache directory access degnied issue

app/asr_worker.py

@@ -1,8 +1,14 @@
+import os
 import numpy as np
 import sherpa_onnx
 import scipy.signal
 from opencc import OpenCC
 from huggingface_hub import hf_hub_download
+from pathlib import Path
+
+# Ensure Hugging Face cache is in a user-writable directory
+CACHE_DIR = Path(__file__).parent / "hf_cache"
+os.makedirs(CACHE_DIR, exist_ok=True)
 
 converter = OpenCC('s2t')
 
@@ -21,6 +27,7 @@ for key, path in FILES.items():
     LOCAL_PATHS[key] = hf_hub_download(
         repo_id=REPO_ID,
         filename=path,
+        cache_dir=str(CACHE_DIR),
     )
 
 # Audio resampling utility