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/audit/service.go

@@ -0,0 +1,37 @@
+package audit
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/badu/bus"
+	"github.com/badu/bus/test_scenarios/fire-and-forget/events"
+)
+
+type ServiceImpl struct {
+	sb *strings.Builder
+}
+
+func NewAuditService(sb *strings.Builder) ServiceImpl {
+	result := ServiceImpl{sb: sb}
+	bus.Sub(result.OnUserRegisteredEvent)
+	bus.SubCancel(result.OnSMSRequestEvent)
+	bus.SubCancel(result.OnSMSSentEvent)
+	return result
+}
+
+// OnUserRegisteredEvent is classic event handler
+func (s *ServiceImpl) OnUserRegisteredEvent(event events.UserRegisteredEvent) {
+	// we can save audit data here
+}
+
+// OnSMSRequestEvent is a pub-unsub type, we have to return 'false' to continue listening for this kind of events
+func (s *ServiceImpl) OnSMSRequestEvent(event events.SMSRequestEvent) bool {
+	return false
+}
+
+// OnSMSSentEvent is a pub-unsub type where we give up on listening after receiving first message
+func (s *ServiceImpl) OnSMSSentEvent(event events.SMSSentEvent) bool {
+	s.sb.WriteString(fmt.Sprintf("audit event : an sms was %s sent to %s with message %s\n", event.Status, event.Request.Number, event.Request.Message))
+	return true // after first event, audit will give up listening for events
+}