allowStepUp property
When true, the scope may step quality up after a sustained period
of good performance (e.g. after thermal recovery).
Defaults to true — allows Phase 3 to self-correct a conservative Phase 2
warmup decision. Step-up requires 10 consecutive under-budget windows
(≈ 20 seconds) plus an 8-second cooldown, so the transition is invisible.
Implementation
final bool allowStepUp;