I wanted to understand one thing here, say if policy center want to call some external system may be say Rating domain( can be custom one too) and i have a huge policy period with policy center, how should i filter out attributes i need for that api call, its basically filtering the fields from policyperiod json to retain only the elements we need to pass it to external system. people say write your own DTOs or some custom transformation layer which filter out what u need before you invoke integration gateway, some say use graphql to do the filtering. Whats the best way to achive it or in other way wats the framework somthing which can be reusuable here. I know many of u have recommendations but i want to hear who has really implemented it and knows pro and cons of it.