Too many data contracts? #34
Description
What is the right balance of data contract boundaries (DPL currently splits them for the DB, accessor, Managers/Engines, and Clients).
This helps bound changes & makes it easier to expose just the needed data, but results in a lot of data conversions and types. Adding a datatype turns into 5+ new files (migrations, data prep, and call chain types).
How can we reduce the burden of added types?