Enhance insert Method in BaseIndex to Support Customizable Transf…

…ormations (#16206)

llama-index-core/llama_index/core/indices/base.py

@@ -210,6 +210,7 @@ def insert(self, document: Document, **insert_kwargs: Any) -> None:
                 [document],
                 self._transformations,
                 show_progress=self._show_progress,
+                **insert_kwargs,
             )
 
             self.insert_nodes(nodes, **insert_kwargs)