fix typing error

compendium_v2/routes/survey.py

@@ -74,7 +74,8 @@ def open_survey(nren_name) -> Any:
         verification_status = response.answers["verification_status"]
     elif previous_response:
         # TODO add a 'migration' hook here for updating data per year
-        data = previous_response.answers["data"]
+        previous_response_data: dict = previous_response.answers["data"]
+        data = previous_response_data
         verification_status = {question_name: VerificationStatus.Unverified for question_name in data.keys()}
 
     open_survey: dict = {