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/store/admission_queue_integration_test.go

@@ -434,6 +434,23 @@ WHERE id = $1::uuid`, queuedAtomicTask.ID, queuedSyntheticRiverJobID)
 	if err != nil || queuedAdmission.Status != "waiting" {
 		t.Fatalf("atomic queued admission=%+v err=%v, want waiting", queuedAdmission, err)
 	}
+	if len(queuedAdmission.Scopes) == 0 {
+		t.Fatal("queued admission did not persist its scope snapshot")
+	}
+	waitingAdmissionSnapshots, err := first.ListWaitingAsyncAdmissions(ctx, 1000)
+	if err != nil {
+		t.Fatalf("list waiting async admission snapshots: %v", err)
+	}
+	var listedSnapshot *TaskAdmission
+	for index := range waitingAdmissionSnapshots {
+		if waitingAdmissionSnapshots[index].TaskID == queuedAtomicTask.ID {
+			listedSnapshot = &waitingAdmissionSnapshots[index]
+			break
+		}
+	}
+	if listedSnapshot == nil || len(listedSnapshot.Scopes) != len(queuedAdmission.Scopes) {
+		t.Fatalf("listed admission snapshot=%+v, want %d scopes", listedSnapshot, len(queuedAdmission.Scopes))
+	}
 	var riverJobID int64
 	if err := first.pool.QueryRow(ctx, `
 SELECT