perf(worker): 持久化准入快照提升队列吞吐

原因：线上 P24 验收显示 Worker 在每轮准入前逐条恢复媒体、重算候选和查询 attempts，跨地域查询导致 48 个执行槽长期只能使用约 8 至 16 个。\n\n影响：任务首次排队时保存鉴权后的 admission scope 快照，Worker 单次批量读取并只刷新动态总容量；显式重新选路保留完整慢路径。验收模拟器改到非数据库专用 Worker 节点，运行期 85% 作为立即中止硬门禁，80% 继续作为容量认证目标。\n\n验证：Go 全量测试、go vet、govulncheck、真实 PostgreSQL 迁移与跨 Store 集成测试、ShellCheck、发布及验收脚本、OpenAPI、前端 lint/test/build、pnpm audit high、Compose 与 Kubernetes 渲染均通过。

apps/api/internal/runner/admission_test.go

@@ -2,10 +2,43 @@ package runner
 
 import (
 	"testing"
+	"time"
 
 	"github.com/easyai/easyai-ai-gateway/apps/api/internal/store"
 )
 
+func TestAdmissionInputFromSnapshotRefreshesWorkerCapacity(t *testing.T) {
+	admission := store.TaskAdmission{
+		TaskID:          "task-1",
+		PlatformID:      "platform-1",
+		PlatformModelID: "model-1",
+		UserGroupID:     "group-1",
+		QueueKey:        "queue-1",
+		Mode:            "async",
+		Priority:        7,
+		Scopes: []store.AdmissionScope{
+			{ScopeType: "platform_model", ScopeKey: "model-1", ConcurrentLimit: 10},
+			{ScopeType: "worker_capacity", ScopeKey: "global", ConcurrentLimit: 48},
+		},
+		ReselectRequestedAt: time.Time{},
+	}
+
+	input := admissionInputFromSnapshot(admission, 24)
+
+	if input.TaskID != admission.TaskID || input.PlatformModelID != admission.PlatformModelID || len(input.Scopes) != 2 {
+		t.Fatalf("unexpected admission input: %+v", input)
+	}
+	if input.Scopes[1].ConcurrentLimit != 24 {
+		t.Fatalf("worker capacity=%v, want 24", input.Scopes[1].ConcurrentLimit)
+	}
+	if input.Scopes[0].ConcurrentLimit != 10 {
+		t.Fatalf("business scope changed: %+v", input.Scopes[0])
+	}
+	if admission.Scopes[1].ConcurrentLimit != 48 {
+		t.Fatalf("snapshot was mutated: %+v", admission.Scopes[1])
+	}
+}
+
 func TestDistributedAdmissionModelTypeBoundary(t *testing.T) {
 	for _, modelType := range []string{
 		"image_generate", "image_edit", "image_analysis", "image_vectorize",