V0_1
Draft v0.1 format as specified by https://specs.apollo.dev/incremental/v0.1/, and in this historical commit: https://github.com/graphql/graphql-spec/tree/48cf7263a71a683fab03d45d309fd42d8d9a6659/spec, and implemented by graphql.js version 17.0.0-alpha.2, also referred to as 20220824.
Only @defer is supported with this format.