feat(billing): add PAYMENT_PROCESSING invoice status on payment success redirect (all except CBE bill)

packages/types/src/freight/index.ts

@@ -161,6 +161,8 @@ export enum InvoiceStatus {
   /** Issued and awaiting payment (alias of PENDING for fee invoices). */
   Issued = "ISSUED",
   Pending = "PENDING",
+  /** Customer completed provider checkout (success redirect); awaiting webhook confirmation. */
+  PaymentProcessing = "PAYMENT_PROCESSING",
   /** Some, but not all, of the balance has been settled. */
   PartiallyPaid = "PARTIALLY_PAID",
   Paid = "PAID",