feat(transfers): add remittanceInformation to transfer-out request

openapi/components/schemas/transfers/TransferOutRequest.yaml

@@ -16,3 +16,13 @@ properties:
       Amount in the smallest unit of the currency (e.g., cents for USD/EUR,
       satoshis for BTC)
     example: 12550
+  remittanceInformation:
+    type: string
+    maxLength: 80
+    description: >-
+      Free-form information about the payment that travels with it to the
+      recipient. The field this populates depends on the payment rail: for ACH
+      it populates the Addenda record, for FedNow and RTP it populates the
+      remittanceInformation field, and for wires it populates the OBI
+      (Originator to Beneficiary Information) / beneficiary information.
+    example: '12345'

openapi/paths/transfers/transfer_out.yaml

@@ -33,6 +33,7 @@ post:
                 accountId: ExternalAccount:e85dcbd6-dced-4ec4-b756-3c3a9ea3d965
                 paymentRail: ACH
               amount: 12550
+              remittanceInformation: '12345'
   responses:
     '201':
       description: Transfer-out request created successfully