chore: API documentation updates for CSAT surveys (#7255)

- Expose conversation uuid in APIs
- swagger documentation for cast survey update via public/message/update endpoints
- swagger documentation for survey/responses/conversation_uuid endpoint

Fixes: #6328

swagger/parameters/conversation_uuid.yml

@@ -0,0 +1,5 @@
+in: path
+name: conversation_uuid
+type: integer
+required: true
+description: The uuid of the conversation

swagger/parameters/index.yml

@@ -22,6 +22,9 @@ contact_sort_param:
 conversation_id:
   $ref: ./conversation_id.yml
 
+conversation_uuid:
+  $ref: ./conversation_uuid.yml
+
 custom_filter_id:
   $ref: ./custom_filter_id.yml