Update Notification Handler to Send Notifications Asynchronously

- Modified the Send method in the NotificationHandler to dispatch notifications asynchronously by using a goroutine, improving responsiveness and allowing the handler to return immediately after initiating the send process.
- This change enhances the user experience by not blocking the request while the notification is being sent, ensuring smoother operation of the API.

internal/notification/handler.go

@@ -50,7 +50,7 @@ func (h *NotificationHandler) Send(c echo.Context) error {
 	}
 
 	// Send notification
-	h.service.Send(context.Background(), &req)
+	go h.service.Send(context.Background(), &req)
 
 	return response.Created(c, nil, "Notification sent successfully")
 }