fix(update): send webhook on store live detection (Xiaomi 已上架)

updateStoreReviewLive was calling IM notifier but not sendWebhook,
so polling-detected APPROVED events (e.g. Xiaomi going live) never
triggered the tenant's configured webhook URL.

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

update-service/src/main/java/com/xuqm/update/service/AppStoreService.java

@@ -402,6 +402,7 @@ public class AppStoreService {
                     Map.of("storeType", storeType,
                             "preExisting", preExisting,
                             "publishStatus", saved.getPublishStatus().name()));
+            sendWebhook(saved, storeType, AppVersionEntity.StoreReviewState.APPROVED, reason);
             storeReviewImNotifier.notifyStoreReviewChange(
                     saved.getAppKey(), saved.getId(),
                     storeType, AppVersionEntity.StoreReviewState.APPROVED.name(),