Function sequence_depths 

pub fn sequence_depths(
    table: &CostTable,
    cal: &AcceptanceCalibration,
    confidences: &[&[f32]],
    known_drafts: &[usize],
    k_max: usize,
    row_budget: usize,
    slack: f64,
) -> Vec<usize>

2026-10-04: Drafts to verify per sequence: see the module doc. drafts[i] is sequence i’s draft confidences (top-1 log-probabilities, in draft order; its length is how many drafts it has; an empty slice with known_drafts[i] > 0 means drafts without confidences).