add comment to autogenerate_session_id

Author: toillium

clickhouse/datadog_checks/clickhouse/clickhouse.py

@@ -2,7 +2,6 @@
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
 import clickhouse_connect
-
 from datadog_checks.base import AgentCheck, ConfigurationError, is_affirmative
 from datadog_checks.base.utils.db import QueryManager
 
@@ -120,6 +119,7 @@ def connect(self):
                 compress=self._compression,
                 ca_cert=self._tls_ca_cert,
                 verify=self._verify,
+                # https://clickhouse.com/docs/integrations/language-clients/python/driver-api#multi-threaded-applications
                 autogenerate_session_id=False,
                 # https://clickhouse.com/docs/integrations/python#settings-argument
                 settings={},