adding try/catch if non neo4j db supplied

rag_sec/document_search_system.py

@@ -155,7 +155,10 @@ class DocumentSearchSystem:
         blockchain_details = self.data_transformer.secure_transform({"type": "response", "content": response})
 
         # Log relationships to Neo4j
-        self.neo4j_handler.log_relationships(query, transformed_query, response, retrieved_docs)
+        try:
+            self.neo4j_handler.log_relationships(query, transformed_query, response, retrieved_docs)
+        except Exception as e:
+            print(e)
 
         return {
             "status": "success",