feat(deploy): 切换宁波单节点生产拓扑

移除已停用的香港 API、Web、Worker 和边缘 Service 渲染结果，将 Worker 与容量控制器固定到宁波单实例，并在发布成功后清理旧香港资源。\n\n容量控制器忽略最大副本为零的站点，集群环境允许不再声明香港主机；单节点 production acceptance 不再依赖香港 Service、Deployment 或 SSH 回退。\n\n验证：Go 全量测试与 go vet；迁移安全检查；Kustomize 单节点渲染；ShellCheck；cluster release、production acceptance 和 manual release 测试。

apps/api/internal/capacitycontroller/controller.go

@@ -140,12 +140,15 @@ func (controller *Controller) reconcile(ctx context.Context) error {
 	sites := make([]SiteResources, 0, 2)
 	kubernetesStates := make(map[string]KubernetesSiteState, 2)
 	for _, site := range []string{"ningbo", "hongkong"} {
+		minReplicas, maxReplicas := controller.siteReplicaBounds(site)
+		if maxReplicas == 0 {
+			continue
+		}
 		state, stateErr := controller.kubernetes.SiteState(ctx, site)
 		if stateErr != nil {
 			return stateErr
 		}
 		kubernetesStates[site] = state
-		minReplicas, maxReplicas := controller.siteReplicaBounds(site)
 		sites = append(sites, SiteResources{
 			Site: site, CurrentReplicas: state.CurrentReplicas,
 			MinReplicas: minReplicas, MaxReplicas: maxReplicas,