db: Use cursor_factory psycopg2 option.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
(cherry picked from commit b4cf9ad777)

zproject/computed_settings.py

@@ -9,7 +9,7 @@ from django.template.loaders import app_directories
 
 import zerver.lib.logging_util
 from scripts.lib.zulip_tools import get_tornado_ports
-from zerver.lib.db import TimeTrackingConnection
+from zerver.lib.db import TimeTrackingConnection, TimeTrackingCursor
 
 from .config import (
     DEPLOY_ROOT,
@@ -287,6 +287,7 @@ DATABASES: Dict[str, Dict[str, Any]] = {
         "CONN_MAX_AGE": 600,
         "OPTIONS": {
             "connection_factory": TimeTrackingConnection,
+            "cursor_factory": TimeTrackingCursor,
         },
     }
 }