feat: add expiration to invoice

packages/types/src/freight/index.ts

@@ -140,6 +140,8 @@ export enum InvoiceStatus {
   Overdue = "OVERDUE",
   Cancelled = "CANCELLED",
   Refunded = "REFUNDED",
+  /** Pay window closed before settlement; terminal, cannot be paid. */
+  Expired = "EXPIRED",
 }
 
 /** Originating subsystem an invoice bills for; namespaces invoice events. */