chore: import upstream snapshot with attribution

pkg/context/graphql_features.go

@@ -0,0 +1,19 @@
+package context
+
+import "context"
+
+// graphQLFeaturesKey is a context key for GraphQL feature flags
+type graphQLFeaturesKey struct{}
+
+// withGraphQLFeatures adds GraphQL feature flags to the context
+func WithGraphQLFeatures(ctx context.Context, features ...string) context.Context {
+	return context.WithValue(ctx, graphQLFeaturesKey{}, features)
+}
+
+// GetGraphQLFeatures retrieves GraphQL feature flags from the context
+func GetGraphQLFeatures(ctx context.Context) []string {
+	if features, ok := ctx.Value(graphQLFeaturesKey{}).([]string); ok {
+		return features
+	}
+	return nil
+}