Resolve "Error handling in event publishing via entity services could be improved"

Description

See #248

controller/eventService/Service.go

@@ -85,6 +85,7 @@ func (e *EventService) PublishEvent(topic string, event event.Event) error {
 	return nil
 }
 
+// RetryPublish is used to retry publishing an event after a failed attempt.
 func (e *EventService) RetryPublish(topic string, event event.Event) error {
 	ctx := context.Background()
 	backOff := retry.NewConstant(2 * time.Second)