codex: address recurring timer restart review (#17380)

codex-rs/core/tests/suite/timers.rs

@@ -327,13 +327,12 @@ async fn queued_messages_feature_consumes_messages_without_timers() -> Result<()
     .await;
 
     let requests = mock.requests();
-    assert_eq!(requests.len(), 2);
-    assert!(
-        requests[1]
+    assert!(requests.iter().any(|request| {
+        request
             .message_input_texts("user")
             .iter()
             .any(|message| message.contains("<content>\nqueued hello\n</content>"))
-    );
+    }));
 
     Ok(())
 }