fix(update-service): 服务开通检查改为查 t_feature_service.enabled，而非 existsByAppKey

existsByAppKey 在服务关闭但历史版本仍存在时会误判为已开通。
改为调 tenant-service 内部接口 /services/{platform}/UPDATE 查 enabled 字段。

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

update-service/src/main/java/com/xuqm/update/controller/AppVersionController.java

@@ -75,7 +75,7 @@ public class AppVersionController {
             @RequestParam(required = false) String userId) {
 
         String resolvedAppKey = resolveAndValidate(appKey, platform, licenseFile);
-        boolean serviceActivated = versionRepository.existsByAppKey(resolvedAppKey);
+        boolean serviceActivated = tenantClient.isUpdateServiceEnabled(resolvedAppKey, platform.name());
         boolean allowAnonymousCheck = publishConfigService.allowAnonymousUpdateCheck(resolvedAppKey);
 
         if (!serviceActivated) {

update-service/src/main/java/com/xuqm/update/repository/AppVersionRepository.java

@@ -56,6 +56,4 @@ public interface AppVersionRepository extends JpaRepository<AppVersionEntity, St
     List<AppVersionEntity> findByAppKeyAndPlatformAndPackageNameAndVersionCodeAndPublishStatus(
             String appKey, AppVersionEntity.Platform platform, String packageName, int versionCode,
             AppVersionEntity.PublishStatus publishStatus);
-
-    boolean existsByAppKey(String appKey);
 }

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

@@ -32,6 +32,24 @@ public class UpdateTenantClient {
         return cache.computeIfAbsent(appKey, this::fetchPlatformInfo);
     }
 
+    public boolean isUpdateServiceEnabled(String appKey, String platform) {
+        String url = UriComponentsBuilder.fromHttpUrl(tenantServiceUrl)
+                .path("/api/internal/sdk/apps/{appKey}/services/{platform}/UPDATE")
+                .buildAndExpand(appKey, platform)
+                .toUriString();
+        HttpHeaders headers = new HttpHeaders();
+        headers.set("X-Internal-Token", internalToken);
+        try {
+            ResponseEntity<JsonNode> response = restTemplate.exchange(
+                    url, HttpMethod.GET, new HttpEntity<>(headers), JsonNode.class);
+            JsonNode data = response.getBody() == null ? null : response.getBody().path("data");
+            if (response.getStatusCode().is2xxSuccessful() && data != null && !data.isMissingNode()) {
+                return data.path("enabled").asBoolean(false);
+            }
+        } catch (RestClientException ignored) {}
+        return false;
+    }
+
     private PlatformInfo fetchPlatformInfo(String appKey) {
         String url = UriComponentsBuilder.fromHttpUrl(tenantServiceUrl)
                 .path("/api/internal/sdk/apps/{appKey}/platform-info")