Each drafter layer's context K/V [B, kvHeads, L, headDim] (owned) of B × L context rows [B, L, H] (borrowed), at absolute positions from position (one shared, or [B] when the rows start apart).
position
Each drafter layer's context K/V [B, kvHeads, L, headDim] (owned) of B × L context rows [B, L, H] (borrowed), at absolute positions from
position(one shared, or [B] when the rows start apart).