test: stabilize timer tests with FakeTimeProvider#10216
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Use FakeTimeProvider for the timer test cluster and drive timer ticks through diagnostic events instead of wall-clock delays. Inject TimeProvider into timer grains so callback delays are advanced deterministically by the tests. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This was referenced Jun 14, 2026
This was referenced Jun 22, 2026
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This fixes the timer test flake by removing wall-clock waits from the timer test flow. The timer test cluster now uses a FakeTimeProvider for grain timers, timer callback delays consume the injected TimeProvider, and tests drive callbacks using timer and callback diagnostic events so fake time is advanced only after the callback delay is registered.
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