How to automatically trigger validation? (or: possibility to add annotations to query/mutation interfaces)

[ghost]

Hi everyone, thanks for the great library.

We can add javax.validation annotations very easily, which is great. But as far as I can see, there's no easy way to (automatically) trigger the validation for each operation.

Currently we have to add the @Validated annotation to our operation implementations. Not a huge deal, but easy to forget. It would be neat if we could configure custom annotations to be added to the operation interfaces.

Our current workaround is to derive custom annotated sub-interfaces for use with the parentInterfaces configuration options. This works, but adds clutter to our codebase.

Is there a way to achieve automatic validation that maybe I'm not seeing?