pub const BA_GATES_LOG_SLOTS: usize = _; // 7usizeExpand description
2026-09-25: Once-flags ba_gates_log keeps: one per guard, plus the twin’s.
pub const BA_GATES_LOG_SLOTS: usize = _; // 7usize2026-09-25: Once-flags ba_gates_log keeps: one per guard, plus the twin’s.