The voucher-import linkage branch picked write targets by kpi_name LIKE '%cash%' and wrote the monetary-fund ledger balance (yuan) into derived KPIs (F_OP_CFLOW / F_FCF / F_BEP_REVENUE_CASH / F_BEP_COVER_CASH). Replace with an explicit kpi_code whitelist plus a unit/caliber gate that refuses writes on mismatch and reports them via kpi_sync_skipped.
Read-only equivalence probe (real function + intercepted writes + rollback) before/after: before wrote 4 derived KPIs, after writes only F_CASH_SAFETY. tests: +9 new cases; pytest failure set identical to baseline (15/15 same ids).
Hermes CI Fix
1f7be6b5ae