What I'm proposing doesn't change that. It's just to information necessary to keep strongly typed data in sync between the database and dtos. To help with seria

What I'm proposing doesn't change that. It's just to information necessary to keep strongly typed data in sync between the database and dtos. To help with serialization and mapping. Compile time type safety. When querying db for schema you don't get enough information to be able to generate very good code in all cases. Language-first way (define schema in language and generate database schema/migrations) ties you to just one language. And usually these tools don't support using all database features.