pub const SLICE_CHAIN_LATENCY: usize = _; // 60usizeExpand description
Cycles from a chain’s issue until its four nodes are presented.
Three lanes in series: 3 × 20 = 60 with Haraka, 3 × 28 = 84 with BLAKE3,
3 × 82 = 246 with SHA-512. The factory adds this to its
END_DELAY.