feat: align DDS with common permission and vector flow

dds-backoffice/src/main/java/com/cloudhandson/ddsbackoffice/service/DdsQueryService.java

@@ -57,6 +57,10 @@ public class DdsQueryService {
     );
   }
 
+  public String vectorObject() {
+    return properties.vectorObject();
+  }
+
   public DdsQueryResult query(String userKey, String sourceKey, String searchText, int requestedLimit) {
     var normalizedUserKey = normalizeUserKey(userKey);
     var normalizedSourceKey = normalizeSourceKey(sourceKey);