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/fire-and-forget/notifications/email_service.go

@@ -0,0 +1,27 @@
+package notifications
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/badu/bus"
+	"github.com/badu/bus/test_scenarios/fire-and-forget/events"
+)
+
+type EmailServiceImpl struct {
+	sb *strings.Builder
+}
+
+func NewEmailService(sb *strings.Builder) EmailServiceImpl {
+	result := EmailServiceImpl{sb: sb}
+	bus.Sub(result.OnUserRegisteredEvent)
+	return result
+}
+
+func (s *EmailServiceImpl) OnUserRegisteredEvent(e events.UserRegisteredEvent) {
+	s.sb.WriteString(fmt.Sprintf("user %s has registered - sending welcome email message\n", e.UserName))
+	bus.Pub(events.SMSRequestEvent{
+		Number:  e.Phone,
+		Message: fmt.Sprintf("%s your user account was created. Check your email for instructions", e.UserName),
+	})
+}

common/utils/event/test_scenarios/fire-and-forget/notifications/sms_service.go

@@ -0,0 +1,27 @@
+package notifications
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/badu/bus"
+	"github.com/badu/bus/test_scenarios/fire-and-forget/events"
+)
+
+type SmsServiceImpl struct {
+	sb *strings.Builder
+}
+
+func NewSmsService(sb *strings.Builder) SmsServiceImpl {
+	result := SmsServiceImpl{sb: sb}
+	bus.Sub(result.OnSMSSendRequest)
+	return result
+}
+
+func (s *SmsServiceImpl) OnSMSSendRequest(event events.SMSRequestEvent) {
+	s.sb.WriteString(fmt.Sprintf("sms sent requested for number %s with message %s\n", event.Number, event.Message))
+	bus.Pub(events.SMSSentEvent{
+		Request: event,
+		Status:  "successfully sent",
+	})
+}