refactor(go): default to go vehicle topics

go/vehicle-gateway/cmd/stat-writer/main_test.go

@@ -74,6 +74,16 @@ func TestProcessStatMessageRecordsMetrics(t *testing.T) {
 	}
 }
 
+func TestLoadConfigDefaultsToGoRawTopics(t *testing.T) {
+	cfg := loadConfig()
+
+	got := strings.Join(cfg.KafkaTopics, ",")
+	want := "vehicle.raw.go.gb32960.v1,vehicle.raw.go.jt808.v1,vehicle.raw.go.yutong-mqtt.v1"
+	if got != want {
+		t.Fatalf("KafkaTopics = %q, want %q", got, want)
+	}
+}
+
 type contextCheckingStatAppender struct {
 	ctxErr error
 	count  int