refactor(api): expose GraphQL transport snapshot flag

Co-Authored-By: Virgil <virgil@lethean.io>

spec_builder_helper_test.go

@@ -305,6 +305,9 @@ func TestEngine_Good_TransportConfigCarriesEngineMetadata(t *testing.T) {
 	if cfg.GraphQLPath != "/gql" {
 		t.Fatalf("expected graphql path /gql, got %q", cfg.GraphQLPath)
 	}
+	if !cfg.GraphQLEnabled {
+		t.Fatal("expected GraphQL to be enabled")
+	}
 	if !cfg.GraphQLPlayground {
 		t.Fatal("expected GraphQL playground to be enabled")
 	}

transport.go

@@ -15,6 +15,7 @@ import "strings"
 type TransportConfig struct {
 	SwaggerPath       string
 	GraphQLPath       string
+	GraphQLEnabled     bool
 	GraphQLPlayground bool
 	WSPath            string
 	SSEPath           string
@@ -36,6 +37,7 @@ func (e *Engine) TransportConfig() TransportConfig {
 	}
 
 	cfg := TransportConfig{
+		GraphQLEnabled:    e.graphql != nil,
 		GraphQLPlayground: e.graphql != nil && e.graphql.playground,
 		PprofEnabled:      e.pprofEnabled,
 		ExpvarEnabled:     e.expvarEnabled,