address review comments

Author: arjun4084346

clients/da-vinci-client/src/main/java/com/linkedin/davinci/DaVinciBackend.java

@@ -564,12 +564,12 @@ public SubscriptionBasedReadOnlyStoreRepository getStoreRepository() {
 
   /**
    * Resolves and returns the store object for the given store name.
-   * For user system stores, this returns the SystemStoreAttributes from the parent user store.
-   * For regular stores and shared system stores, this returns the Store object directly.
+   * For user system stores, it finds the RT name from the SystemStoreAttributes of the parent user store.
+   * For regular user stores and top level system stores, it finds the RT name from the Store object directly.
    */
   private String getRealTimeTopicName(String storeName) {
     VeniceSystemStoreType systemStoreType = VeniceSystemStoreType.getSystemStoreType(storeName);
-    if (systemStoreType != null) {
+    if (systemStoreType != null && systemStoreType.isStoreZkShared()) {
       // it is a user system store
       String userStoreName = VeniceSystemStoreType.extractUserStoreName(storeName);
       Store userStore = storeRepository.getStore(userStoreName);