test(utils): 添加事件驱动模型测试

- 在 sqrt_test.go 中添加了 fastSqr1 测试函数，用于测试事件驱动模型
- 新增了 Event 和 Uint32AsyncEvent 类型用于测试
- 更新了 go.work、go.mod 和

common/utils/event/test_scenarios/factory-request-reply/cart/service.go

@@ -0,0 +1,47 @@
+package cart
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"github.com/badu/bus"
+	"github.com/badu/bus/test_scenarios/factory-request-reply/events"
+	"github.com/badu/bus/test_scenarios/factory-request-reply/inventory"
+	"github.com/badu/bus/test_scenarios/factory-request-reply/prices"
+)
+
+type ServiceImpl struct {
+	sb *strings.Builder
+}
+
+func NewService(sb *strings.Builder) ServiceImpl {
+	result := ServiceImpl{sb: sb}
+	return result
+}
+
+func (s *ServiceImpl) AddProductToCart(ctx context.Context, productID string) error {
+	inventoryClientRequest := events.NewInventoryGRPCClientRequestEvent()
+	bus.Pub(inventoryClientRequest)
+	inventoryClientRequest.WaitReply()
+
+	pricesClientRequest := events.NewPricesGRPCClientRequestEvent()
+	bus.Pub(pricesClientRequest)
+	pricesClientRequest.WaitReply()
+
+	defer inventoryClientRequest.Conn.Close() // close GRPC connection when done
+	stockResponse, err := inventoryClientRequest.Client.GetStockForProduct(ctx, &inventory.ProductIDRequest{ID: productID})
+	if err != nil {
+		return err
+	}
+
+	defer pricesClientRequest.Conn.Close() // close GRPC connection when done
+	priceResponse, err := pricesClientRequest.Client.GetPricesForProduct(ctx, &prices.ProductIDRequest{ID: productID})
+	if err != nil {
+		return err
+	}
+
+	s.sb.WriteString(fmt.Sprintf("stock %0.2fpcs @ price %0.2f$\n", stockResponse.Stock, priceResponse.Price))
+
+	return nil
+}