P0-A cash.py: scope api_update_plan / api_delete_plan / api_complete_plan /
api_register_payment to session entity (cross-entity id -> 404, aligning with
the file's existing get_entity_id endpoints).
P0-B budget.py: write entity_id on BudgetPlan creation + require the KPI to
belong to the session entity; scope /comparison, /comparison/kpi/{id} and
/deviation-report reads to the session entity.
P1 notifications.py: explicit field whitelist (name/config/enabled) on
update_channel to close mass-assignment.
P1 read leaks scoped to session entity: bot_kpis list, data_quality check/stats
(KPI calibre only; quality-log table has no entity_id column), kpis causality
chain + associate-map (KPI and map ownership), dashboard my-kpis,
customer_dashboard list, kpi_governance audit, budget_generate candidates,
driver_budget history (+ entity_id on its write path), expenses stats
(+ entity_id on its write path).
P2 okr_templates.py: write entity_id on the StrategicMap created by apply.
tests: tests/test_cross_entity_isolation_batch4_20260921.py (30 cases;
RED before fix = 22 failed, GREEN after = 30 passed; full suite 1302 passed /
1 xfailed / 0 failed).
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).
Single source: app/utils/voucher_guard.py (NOT EXISTS on voucher_void_marks,
key = entity_id+voucher_no+voucher_date and revoked_at IS NULL; same caliber as
the DB view cma.v_voucher_details_active). No hardcoded voucher numbers.
Consumers now guarded: cash.py import linkage (2 fns), reports.py subject/BS
amount (2 sites, also entity_id isolation added), dashboard.py _bep_sum_field,
alert_attribution.py build_subject_attribution. kpi_value_collector.py now
delegates to the shared guard (removes the previous duplicate implementation).
Tests: new tests/test_void_marker_consumers_20260914.py (6 cases).