Minor cleanup of codex exec output (#4585)

<img width="850" height="723" alt="image"
src="https://github.com/user-attachments/assets/2ae067bf-ba6b-47bf-9ffe-d1c3f3aa1870"
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<img width="872" height="547" alt="image"
src="https://github.com/user-attachments/assets/9058be24-6513-4423-9dae-2d5fd4cbf162"
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codex-rs/exec/src/lib.rs

@@ -364,6 +364,7 @@ pub async fn run_main(cli: Cli, codex_linux_sandbox_exe: Option<PathBuf>) -> any
             }
         }
     }
+    event_processor.print_final_output();
     if error_seen {
         std::process::exit(1);
     }