fix: use map lookup to find subscription instead of looping#1441

dkorittki wants to merge 10 commits intomasterwundergraph/graphql-go-tools:masterfrom

dominik/eng-9080-use-resolve-context-to-do-fast-lookup-of-subscriptionswundergraph/graphql-go-tools:dominik/eng-9080-use-resolve-context-to-do-fast-lookup-of-subscriptionsCopy head branch name to clipboard