Update WAF service mode update to set listener mode

- Add direct mode assignment to listener specification
- Ensure listener mode is updated during concurrent processing
- Simplify mode update logic in UpdateMode method

internal/service/waf.go

@@ -294,6 +294,7 @@ func (s *wafService) UpdateMode(ctx context.Context, req *UpdateModeReq) (*WafSe
 	for _, listener := range listenerList.Items {
 		wg.Add(1)
 		listener := listener // Create new variable for goroutine
+		listener.Spec.Mode = string(req.Mode)
 		go func() {
 			defer wg.Done()
 			log.Info().Msgf("update WAF service mode: %v", listener.Name)