本轮完成“考点与考场变更审批”原生迁移：

GET/POST/PATCH /api/admin/centers
PATCH /api/admin/center-change-requests/{id}
校级数据范围、班级管理员禁用
省市区县及结构化考场校验
正式档案和待审申请代码去重
多级工作流分配、通过与拒绝
终审时原子更新流程、审计、考点及考场
新增开关 ADMIN_NATIVE_CENTERS_ENABLED=false

src/Eis.Application/Administration/IAdminCenterService.cs

@@ -0,0 +1,11 @@
+using System.Text.Json.Nodes;
+
+namespace Eis.Application.Administration;
+
+public interface IAdminCenterService
+{
+    Task<AdminEndpointResult> GetAsync(string sessionToken, CancellationToken cancellationToken);
+    Task<AdminEndpointResult> CreateAsync(string sessionToken, JsonObject body, CancellationToken cancellationToken);
+    Task<AdminEndpointResult> UpdateAsync(string sessionToken, string centerId, JsonObject body, CancellationToken cancellationToken);
+    Task<AdminEndpointResult> ReviewAsync(string sessionToken, string changeRequestId, JsonObject body, CancellationToken cancellationToken);
+}