feat(utils): scoped frame-pacing helper for trial loops#326
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Add high_priority_section() context manager in eegnb/utils/realtime.py that raises three OS settings on entry and restores them on exit: - Scheduler tick: timeBeginPeriod(1) drops Windows default 15.625 ms tick to 1 ms, preventing time.sleep from locking a 120 Hz / 8.33 ms loop to half-rate and dropping every other frame (Windows-only; Linux/macOS already run a 1 ms or finer tick). - Process priority: core.rush(True) -> HIGH_PRIORITY_CLASS. - Python GC: gc.disable() suspends the generational collector. Wire _run_trial_loop through the context manager, replacing the inline core.rush/gc.disable/try-finally block in run(). BlockExperiment gets frame-pacing automatically since it calls _run_trial_loop directly.
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Encapsulate high priority settings into high_priority_section() context manager function in eegnb/utils/realtime.py that raises three OS settings on entry and restores them on exit: