Access Control speed training

30/30 correct; PB 4.115s held; session best 4.392s. Reuse after shell check: preset A1,A2,B1,B2,C1,C2=allow; ignore requests, wildcard, priorities, and allow policies; scan only exact denies and flip their fixed slot to deny. If shell changes, use full priority fallback. Bottleneck: runtime variance.