community[patch]: Add neo4j timeout and value sanitization option (#16138)

The timeout function comes in handy when you want to kill longrunning
queries.
The value sanitization removes all lists that are larger than 128
elements. The idea here is to remove embedding properties from results.

libs/community/tests/integration_tests/graphs/test_neo4j.py

@@ -69,3 +69,22 @@ def test_cypher_return_correct_schema() -> None:
         sorted(relationships, key=lambda x: x["output"]["end"])
         == expected_relationships
     )
+
+
+def test_neo4j_timeout() -> None:
+    """Test that neo4j uses the timeout correctly."""
+    url = os.environ.get("NEO4J_URI")
+    username = os.environ.get("NEO4J_USERNAME")
+    password = os.environ.get("NEO4J_PASSWORD")
+    assert url is not None
+    assert username is not None
+    assert password is not None
+
+    graph = Neo4jGraph(url=url, username=username, password=password, timeout=0.1)
+    try:
+        graph.query("UNWIND range(0,100000,1) AS i MERGE (:Foo {id:i})")
+    except Exception as e:
+        assert (
+            e.code
+            == "Neo.ClientError.Transaction.TransactionTimedOutClientConfiguration"
+        )