Add debugging to list all downloaded files and identify naming issues

app.py

@@ -51,6 +51,13 @@ def ensure_weights():
     import time
     time.sleep(2)
     
+    # Debug: List all files in pretrained_models directory
+    if os.path.exists("pretrained_models"):
+        logger.info("Files in pretrained_models directory:")
+        for root, dirs, files in os.walk("pretrained_models"):
+            for file in files:
+                logger.info("  %s", os.path.join(root, file))
+    
     # Verify critical files exist
     for file_path in need:
         if not os.path.exists(file_path):