Pluggable validation when persisting the query

[sebas5384]

Having the possibility to persist arbitrary queries (in my opinion) is one of the main reasons people use persisted queries at the build time which is difficult to orchestrate and adds more work when migrating over GraphQL as a public API.

Proposal:
Enable modules to extend the validation rules of queries before they are persisted in order to create their own custom logic that applies best to their business use case.