The graphql-go package relies on mutable state defined in init in https://github.com/graphql-go/graphql/blob/master/introspection.go - this means that multiple Defra instances created in the same process share state.

Although it has not yet been known to create issues in production, it is not wonderful, and prevents us from parallelizing the Defra tests using t.Parallel() alongside the --race flag.

I suggest we resolve this by removing the graphql-go dependency, probably whilst moving to a DQL=>GQL transpiler system instead of the SDL parsing stuff we currently rely on.