Audit what every minimal cross-grid criterion repair actually admits

Extends the robust-repair audit with an exact counterfactual consequence ledger. For every inclusion-minimal cross-grid repair, each evaluable grid reports baseline and repaired match counts, newly admitted samples, per-omitted-rule violation counts, a violation-cardinality histogram, and the deterministic earliest witness among samples minimizing waived-rule violations. It does not rank repairs or apply criterion weights. Results are exact for returned samples, not continuous-time proofs, causal claims, quality scores, recommendations, interpretations, predictions, probabilities, or statistical confidence. No licensed catalog, new dependency, or request-time network source is used. One standard quota unit per admitted request; failed or timed-out admitted attempts are not refunded. Do not automatically retry. Historical mode uses an explicit BCE/CE date object and UT1 conventions. Its response is the versioned historical envelope, not the modern UTC envelope. Read result for calculation fields and metadata for limits and uncertainty.