feat(routing): 引入多执行池智能调度

将 Worker 发现、路由画像、容量与执行传输抽象为平台无关接口，新增 Kubernetes 和静态容量适配器，并以 shadow 模式接入生产配置。

实现网络与容量评分、路由防抖、池队列、同步 Worker 租约、一次性执行令牌，以及提交状态不明时禁止重复分配的安全语义。

新增 0105 兼容迁移、管理接口、指标、OpenAPI 和回归测试。已执行全量 Go 测试、go vet、OpenAPI、迁移安全、Compose 与 Kustomize 验证。

apps/api/internal/capacitycontroller/kubernetes.go

@@ -32,8 +32,8 @@ type KubernetesClient struct {
 	client    *http.Client
 }
 
-type KubernetesSiteState struct {
-	Site                     string
+type PoolInfrastructureState struct {
+	PoolID                   string
 	NodeName                 string
 	CurrentReplicas          int
 	Revision                 string
@@ -45,10 +45,10 @@ type KubernetesSiteState struct {
 	UsedMilliCPU             int64
 	WorkerRequestMilliCPU    int64
 	MemoryPressure           bool
-	Nodes                    []KubernetesNodeState
+	Nodes                    []PoolNodeState
 }
 
-type KubernetesNodeState struct {
+type PoolNodeState struct {
 	NodeName               string
 	CurrentReplicas        int
 	AllocatableMemoryBytes int64
@@ -60,6 +60,25 @@ type KubernetesNodeState struct {
 	MemoryPressure         bool
 }
 
+type KubernetesSiteState = PoolInfrastructureState
+type KubernetesNodeState = PoolNodeState
+
+var _ OrchestratorAdapter = (*KubernetesClient)(nil)
+
+func (client *KubernetesClient) PoolState(ctx context.Context, poolID, adapterRef string) (PoolInfrastructureState, error) {
+	state, err := client.SiteState(ctx, adapterRef)
+	state.PoolID = poolID
+	return state, err
+}
+
+func (client *KubernetesClient) ScalePool(ctx context.Context, _, adapterRef string, replicas int) error {
+	return client.ScaleWorkerDeployment(ctx, adapterRef, replicas)
+}
+
+func (client *KubernetesClient) SetInstanceTerminationPriority(ctx context.Context, instanceRef string, priority int) error {
+	return client.SetPodDeletionCost(ctx, instanceRef, priority)
+}
+
 func NewKubernetesClient(config KubernetesConfig) (*KubernetesClient, error) {
 	if strings.TrimSpace(config.Namespace) == "" {
 		return nil, errors.New("capacity controller Kubernetes namespace is required")
@@ -144,7 +163,7 @@ func (client *KubernetesClient) SiteState(ctx context.Context, site string) (Kub
 	if err := client.getJSON(ctx, deploymentPath, &deployment); err != nil {
 		return KubernetesSiteState{}, err
 	}
-	state := KubernetesSiteState{Site: site, CurrentReplicas: deployment.Spec.Replicas}
+	state := KubernetesSiteState{PoolID: site, CurrentReplicas: deployment.Spec.Replicas}
 	for _, container := range deployment.Spec.Template.Spec.Containers {
 		if container.Name != "worker" {
 			continue