Better detection for when items were scoped?

[rmosolgo]

Currently, this library checks for whether or not items were scoped by using object equality:

graphql-ruby/lib/graphql/schema/field/scope_extension.rb

Lines 14 to 18 in b0d289e

	if !scoped_items.equal?(value) && !ret_type.reauthorize_scoped_objects
	if (current_runtime_state = Thread.current[:__graphql_runtime_info]) &&
	(query_runtime_state = current_runtime_state[context.query])
	query_runtime_state.was_authorized_by_scope_items = true
	end

This works when scope_items really did something, but not if you want to skip authorization altogether. For example, if you've got a list of items from an external service, and you want to return them as-is, without scoping or authorization, you'd have to do this:

def self.scope_items(items, ctx)
  items.dup # Make a shallow copy so GraphQL-Ruby will know that we authorized this list
end 

I bet there's a more robust way to implement this check (and maybe to implement the runtime metadata, too). I'm going to consider it for 3.0.