fix(server): opening a long thread no longer blocks the server for a second (#17029)

Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
04ad17425aDara Adedeji committed on 10/8/2026, 3:16:52 AM· committed by GitHubparent9fba209
6 files changedLine totals unavailable