Fix getting refenrece folder dirnames that belongs to static documents

Author: mdciri

apps/chatbot-index/src/modules/add_missing_static_docs.py

@@ -60,6 +60,9 @@
             folders_to_remove.append(ref_folder)
 
     if index:
-        VECTOR_INDEX.refresh_index_static_docs(index, static_docs_to_add, [])
-        VECTOR_INDEX.remove_docs_in_folder(index, folders_to_remove)
+        if static_docs_to_add:
+            VECTOR_INDEX.refresh_index_static_docs(index, static_docs_to_add, [])
+        if folders_to_remove:
+            for folder_to_remove in folders_to_remove:
+                VECTOR_INDEX.remove_docs_in_folder(index, folder_to_remove)
         LOGGER.info("Static docs refresh process completed.")