add session ID everywhere

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

@@ -263,7 +263,10 @@ async fn thread_resume_tracks_thread_initialized_analytics() -> Result<()> {
         mcp.read_stream_until_response_message(RequestId::Integer(resume_id)),
     )
     .await??;
-    let ThreadResumeResponse { thread, .. } = to_response::<ThreadResumeResponse>(resume_resp)?;
+    let ThreadResumeResponse {
+        session_id, thread, ..
+    } = to_response::<ThreadResumeResponse>(resume_resp)?;
+    assert!(!session_id.is_empty(), "session id should not be empty");
 
     let payload = wait_for_analytics_payload(&server, DEFAULT_READ_TIMEOUT).await?;
     let event = thread_initialized_event(&payload)?;

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

@@ -78,10 +78,12 @@ async fn thread_start_creates_thread_and_emits_started() -> Result<()> {
     .await??;
     let resp_result = resp.result.clone();
     let ThreadStartResponse {
+        session_id,
         thread,
         model_provider,
         ..
     } = to_response::<ThreadStartResponse>(resp)?;
+    assert!(!session_id.is_empty(), "session id should not be empty");
     assert!(!thread.id.is_empty(), "thread id should not be empty");
     assert!(
         thread.preview.is_empty(),