jfjoch: cancel measurement on daq startuop

src/aare/devices/jfjoch.py

@@ -30,6 +30,9 @@ class JFJochWrapper:
 
         self.__client = jfjoch_client.ApiClient(jfjoch_client.Configuration(host=self.__url))
         self.__api = jfjoch_client.DefaultApi(self.__client)
+        self.cancel()
+        # if not self.is_idle():
+        #     self.initialize()
 
     @staticmethod
     def _extract_status_code(error: Exception) -> int | None: