test: warn on polling loops in tests and make adapter test harnesses event-driven (#22565)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
08dbf834d9Julius Marminge committed on 10/21/2026, 1:05:58 AM· committed by GitHubparentbde6206
8 files changedLine totals unavailable