如何使用terraform开启OpenStack实例销毁保护？

provider "openstack" {
  # OpenStack认证信息配置
  user_name   = "your_username"
  password    = "your_password"
  tenant_name = "your_project_name"
  auth_url    = "your_auth_url"
}

resource "openstack_compute_instance_v2" "example_instance" {
  # 实例配置
  name            = "example-instance"
  flavor_name     = "m1.small"
  image_name      = "ubuntu-18.04"
  key_pair        = "your_key_pair"
  security_groups = ["default"]

  # 网络配置
  network {
    name = "your_network"
  }

  # 添加销毁保护
  metadata = {
    prevent_destroy = "true"
  }
}