Callbacks service docs updated

interface/api/recipients/bodies/recipient.yaml

@@ -1,6 +1,7 @@
 components:
   requestBodies:
     RecipientBody:
+      description: JSON body containing recipient details.
       required: true
       content:
         application/json:

interface/api/recipients/request/recipient.yaml

@@ -1,4 +1,5 @@
 components:
   schemas:
     RecipientRequest:
+      description: Request payload used to create or update a recipient.
       $ref: ../../../models/recipient/recipient.yaml#/components/schemas/Recipient

interface/api/recipients/response/recipient.yaml

@@ -1,6 +1,7 @@
 components:
   schemas:
     RecipientsAuthData:
+      description: Authenticated response payload containing recipients.
       type: object
       additionalProperties: false
       required:
@@ -8,8 +9,10 @@ components:
         - recipients
       properties:
         accessToken:
+          description: Refreshed access token to be used in subsequent API calls.
           $ref: ../../../models/auth/token_data.yaml#/components/schemas/TokenData
         recipients:
+          description: Collection of recipients available to the authenticated account.
           type: array
           items:
             $ref: ../../../models/recipient/recipient.yaml#/components/schemas/Recipient