In the saved `erp` schema:

- **Constraint:** `payment_customer_fk`
- **Source table:** `sales.payment`
- **Target table:** `crm.customer`
- **Ordered column pair:** `customer_id` → `id`
- **Target in scan scope:** Yes

No, this declared FK does **not** point to `legacy.customer.id`; its declared target is `crm.customer.id`.
