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.Infrastructure/Administration/AdminMigrationOptions.cs

@@ -5,7 +5,8 @@ public sealed record AdminMigrationOptions(
     bool NativeOrganizationWritesEnabled = false,
     bool NativeAccountBatchesEnabled = false,
     bool NativeConfigurationEnabled = false,
-    bool NativeNoticeManagementEnabled = false)
+    bool NativeNoticeManagementEnabled = false,
+    bool NativeCentersEnabled = false)
 {
     public static AdminMigrationOptions FromEnvironment(
         bool configuredNativeReadsEnabled,
@@ -14,7 +15,8 @@ public sealed record AdminMigrationOptions(
         bool configuredNativeOrganizationWritesEnabled = false,
         bool configuredNativeAccountBatchesEnabled = false,
         bool configuredNativeConfigurationEnabled = false,
-        bool configuredNativeNoticeManagementEnabled = false)
+        bool configuredNativeNoticeManagementEnabled = false,
+        bool configuredNativeCentersEnabled = false)
     {
         var readsEnabled = ParseBoolean(
             Environment.GetEnvironmentVariable("ADMIN_NATIVE_READS_ENABLED"),
@@ -32,12 +34,15 @@ public sealed record AdminMigrationOptions(
             Environment.GetEnvironmentVariable("ADMIN_NATIVE_NOTICE_MANAGEMENT_ENABLED") ??
             Environment.GetEnvironmentVariable("ADMIN_NATIVE_NOTICE_WRITES_ENABLED"),
             configuredNativeNoticeManagementEnabled);
-        if ((organizationWritesEnabled || accountBatchesEnabled || configurationEnabled || noticeManagementEnabled) && !readsEnabled)
+        var centersEnabled = ParseBoolean(
+            Environment.GetEnvironmentVariable("ADMIN_NATIVE_CENTERS_ENABLED"),
+            configuredNativeCentersEnabled);
+        if ((organizationWritesEnabled || accountBatchesEnabled || configurationEnabled || noticeManagementEnabled || centersEnabled) && !readsEnabled)
         {
             throw new InvalidOperationException(
                 "启用原生组织维护接口前必须同时设置 ADMIN_NATIVE_READS_ENABLED=true");
         }
-        var anyNativeAdminEndpointEnabled = readsEnabled || organizationWritesEnabled || accountBatchesEnabled || configurationEnabled || noticeManagementEnabled;
+        var anyNativeAdminEndpointEnabled = readsEnabled || organizationWritesEnabled || accountBatchesEnabled || configurationEnabled || noticeManagementEnabled || centersEnabled;
         if (anyNativeAdminEndpointEnabled && !authenticationNativeEnabled)
         {
             throw new InvalidOperationException(
@@ -53,7 +58,7 @@ public sealed record AdminMigrationOptions(
                 "管理端仍有接口需要转发给 Node；启用原生管理端接口必须配置共享 Redis 会话");
         }
 
-        return new AdminMigrationOptions(readsEnabled, organizationWritesEnabled, accountBatchesEnabled, configurationEnabled, noticeManagementEnabled);
+        return new AdminMigrationOptions(readsEnabled, organizationWritesEnabled, accountBatchesEnabled, configurationEnabled, noticeManagementEnabled, centersEnabled);
     }
 
     private static bool ParseBoolean(string? value, bool fallback) => value?.Trim().ToLowerInvariant() switch