a7839bc9b9
This commit adds the required infrastructure for instrumenting the GraphQL engine and datafetchers in order to collect metrics. With this infrastructure, we can collect metrics such as: * "graphql.request", a timer for GraphQL query * "graphql.datafetcher", a timer for GraphQL datafetcher calls * "graphql.request.datafetch.count", a distribution summary of datafetcher count per query * "graphql.error", an error counter See gh-29140