add reset method

api_call_counter.py

@@ -17,4 +17,9 @@ class APICallCounter:
 
     def get_total_calls(self):
         """現在の合計カウント状況を返す。"""
-        return self.successful_calls + self.failed_calls
+        return self.successful_calls + self.failed_calls
+
+    def reset(self):
+        """カウント状況をリセットする"""
+        self.successful_calls = 0
+        self.failed_calls = 0