refactor: clean up gate trader configuration

trader/gate/trader.go

@@ -37,6 +37,7 @@ type GateTrader struct {
 // NewGateTrader creates a new Gate trader instance
 func NewGateTrader(apiKey, secretKey string) *GateTrader {
 	config := gateapi.NewConfiguration()
+	config.AddDefaultHeader("X-Gate-Channel-Id", "nofx")
 	client := gateapi.NewAPIClient(config)
 
 	ctx := context.WithValue(context.Background(),