representing guardian review timeouts in protocol types (#17381)

## Summary

- Add `TimedOut` to Guardian/review carrier types:
  - `ReviewDecision::TimedOut`
  - `GuardianAssessmentStatus::TimedOut`
  - app-server v2 `GuardianApprovalReviewStatus::TimedOut`
- Regenerate app-server JSON/TypeScript schemas for the new wire shape.
- Wire the new status through core/app-server/TUI mappings with
conservative fail-closed handling.
- Keep `TimedOut` non-user-selectable in the approval UI.

**Does not change runtime behavior yet; emitting `TimeOut` and
parent-model timeout messaging will come in followup PRs**

codex-rs/app-server-protocol/src/protocol/thread_history.rs

@@ -408,6 +408,7 @@ impl ThreadHistoryBuilder {
             GuardianAssessmentStatus::Denied | GuardianAssessmentStatus::Aborted => {
                 CommandExecutionStatus::Declined
             }
+            GuardianAssessmentStatus::TimedOut => CommandExecutionStatus::Failed,
             GuardianAssessmentStatus::Approved => return,
         };
         let Some(item) = build_item_from_guardian_event(payload, status) else {