Fix worker test stub missing sampling_params

Signed-off-by: Guan-Ming (Wesley) Chiu <105915352+guan404ming@users.noreply.github.com>

Author: guan404ming

tests/unit/scripts/test_response_regeneration.py

@@ -11,6 +11,7 @@
 import importlib.util
 import json
 from pathlib import Path
+from typing import Any
 
 import pytest
 
@@ -434,6 +435,7 @@ class _Args:
     model = "m"
     max_tokens = 16
     max_retries = 0
+    sampling_params: dict[str, Any] = {}
 
 
 class _NullProgress: