Refactor LCVectorStoreComponent to set status when building retriever

src/backend/base/langflow/base/vectorstores/model.py

@@ -79,7 +79,10 @@ class LCVectorStoreComponent(Component):
         """
         vector_store = self.build_vector_store()
         if hasattr(vector_store, "as_retriever"):
-            return vector_store.as_retriever()
+            retriever = vector_store.as_retriever()
+            if self.status is None:
+                self.status = "Retriever built successfully."
+            return retriever
         else:
             raise ValueError(f"Vector Store {vector_store.__class__.__name__} does not have an as_retriever method.")