Record stop-time ACP turn diagnostics (last-event age, oldest pending tool age, pending tool kinds) so wall-clock timeout events show whether the turn was stalled. Diagnostics only.
Co-Authored-By: Paperclip <Paperclip-Paperclip@users.noreply.github.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>