fix(private): 私有化模式下存量 PENDING 服务申请自动开通

之前的自动开通逻辑在重复申请检查之后，导致已有 PENDING 记录时
直接抛 400 而不进入自动开通流程。
现在私有化模式下检测到 PENDING 记录时直接 approveRequest，
不再返回"请等待运营人员处理"错误。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tenant-service/src/main/java/com/xuqm/tenant/service/FeatureServiceManager.java

@@ -86,12 +86,14 @@ public class FeatureServiceManager {
             String applyReason) {
 
         if (isAppWideService(serviceType)) {
-            requestRepository.findFirstByAppKeyAndServiceTypeOrderByCreatedAtDesc(appKey, serviceType)
+            var existing = requestRepository.findFirstByAppKeyAndServiceTypeOrderByCreatedAtDesc(appKey, serviceType);
-                    .ifPresent(req -> {
+            if (existing.isPresent() && existing.get().getStatus() == Status.PENDING) {
-                        if (req.getStatus() == Status.PENDING) {
+                if (deploymentProperties.isPrivate()) {
+                    // 私有化模式：存量 PENDING 请求直接自动开通
+                    return approveRequest(existing.get().getId(), "私有化部署自动开通");
+                }
                 throw new BusinessException(400, "已有待审核的开通申请，请等待运营人员处理");
             }
-                    });
         }
 
         ServiceActivationRequestEntity req = new ServiceActivationRequestEntity();