fix: Path conversion for shard_path

convert_to_safetensors.py

@@ -31,7 +31,7 @@ def convert_shards(model_path):
                 print(f"   Skipping non-tensor: {key} ({type(value)})")
         
         # Save as safetensors
-        new_path = output_path / shard_path.name
+        new_path = output_path / Path(shard_path).name
         save_file(tensors, new_path)
         print(f"   ✓ Saved {len(tensors)} tensors")