Refactor of the tasks

cognee/tasks/source_documents_to_chunks/source_documents_to_chunks.py

@@ -5,6 +5,10 @@ from cognee.modules.data.processing.document_types.Document import Document
 async def source_documents_to_chunks(documents: list[Document], parent_node_id: str = None, user:str=None, user_permissions:str=None):
     graph_engine = await get_graph_engine()
 
+    if parent_node_id is None:
+        documents, parent_node_id = documents
+
+
     nodes = []
     edges = []