Handle guardian review timeouts explicitly

Increase the guardian review timeout and surface reviewer timeouts separately from intentional rejections across tool approval paths, protocol notifications, and TUI rendering.

Co-authored-by: Codex <noreply@openai.com>

codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.v2.schemas.json

@@ -4660,6 +4660,7 @@
         "inProgress",
         "approved",
         "denied",
+        "timedOut",
         "aborted"
       ],
       "type": "string"