Address comments

CHANGELOG.md

@@ -3,7 +3,7 @@
 ## Next
 
 ### Fixed
-- IDs for the Document and Chunk nodes in the lexical graph are now randomly generated and unique across multiple runs, fixing issues in the lexical graph where relationships where created between chunks that were created by different pipeline runs.
+- IDs for the Document and Chunk nodes in the lexical graph are now randomly generated and unique across multiple runs, fixing issues in the lexical graph where relationships were created between chunks that were created by different pipeline runs.
 
 ### Changed
 - The `id_prefix` parameter in the `LexicalGraphConfig` is deprecated.

src/neo4j_graphrag/experimental/components/lexical_graph.py

@@ -13,8 +13,8 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 import asyncio
+import datetime
 import logging
-from datetime import datetime
 from itertools import zip_longest
 from typing import Any, Dict, Optional
 
@@ -112,7 +112,7 @@ def create_document_node(self, document_info: DocumentInfo) -> Neo4jNode:
             label=self.config.document_node_label,
             properties={
                 "path": document_info.path,
-                "createdAt": str(datetime.now()),
+                "createdAt": datetime.datetime.now(datetime.timezone.utc).isoformat(),
                 **document_metadata,
             },
         )