protocol rename

codex-rs/app-server/tests/suite/v2/safety_check_downgrade.rs

@@ -63,7 +63,7 @@ async fn openai_model_header_mismatch_emits_model_rerouted_notification_v2() ->
                 text: "trigger safeguard".to_string(),
                 text_elements: Vec::new(),
             }],
-            user_message_type: None,
+            submission_type: None,
             ..Default::default()
         })
         .await?;
@@ -137,7 +137,7 @@ async fn response_model_field_mismatch_emits_model_rerouted_notification_v2_when
                 text: "trigger response model check".to_string(),
                 text_elements: Vec::new(),
             }],
-            user_message_type: None,
+            submission_type: None,
             ..Default::default()
         })
         .await?;