Fix Codex transcript convergence

server/src/session/transcript.rs

@@ -834,6 +834,9 @@ mod tests {
                 attachments: Vec::new(),
             },
             text("hello"),
+            Event::AssistantTextFinal {
+                text: "hello, revised".into(),
+            },
             Event::ToolStart {
                 id: "t1".into(),
                 tool: "bash".into(),