Create new context per resolver

[odannyc]

I'd like to have the ability to create a new context.Context per resolver and pass it in.

My current issue is that I used newrelic to instrument different things in my application, for example if I want to call an external HTTP service I used the ctx that's passed to my resolver. The issue here is that newrelic requires the ctx to include a brand new new relic "transaction" object if the code that is instrumentation is running inside of a goroutine - and to the best of my knowledge it seems that all gqlgen resolvers run inside of go routines. So I'd like the ability to create some sort of hook BeforeResolver middleware to add to the context before the resolver gets called.

[kyle-young]

@odannyc Did you figure out a workaround for this?