Revert "Remove TODO: I think this isn't worth implementing since in the long term, clients will update and this branch will not be necessary (and thus will primarily be tech debt)"

This reverts commit bbfda0be96.

backend/server/internal/server/api_handlers.go

@@ -59,6 +59,8 @@ func (s *Server) apiSubmitHandler(w http.ResponseWriter, r *http.Request) {
 		deletionRequests, err := s.db.DeletionRequestsForUserAndDevice(r.Context(), userId, deviceId)
 		checkGormError(err)
 		resp.DeletionRequests = deletionRequests
+
+		// TODO: Update this code to call DeletionRequestInc() iff the version is new enough to be using these responses
 	}
 
 	if err := json.NewEncoder(w).Encode(resp); err != nil {