add more logging in apps.alerts.tasks.notify_user.perform_notificatio…

…n task (#3403)

# What this PR does

add more logging in `apps.alerts.tasks.notify_user.perform_notification`
task (related to grafana/oncall-private#2318;
won't solve that issue but will help with the investigation)

engine/apps/alerts/tasks/notify_user.py

@@ -230,8 +230,18 @@ def perform_notification(log_record_pk):
     from apps.base.models import UserNotificationPolicy, UserNotificationPolicyLogRecord
     from apps.telegram.models import TelegramToUserConnector
 
+    # TODO: remove this log line once done investigation
+    task_logger.info(f"perform_notification: log_record {log_record_pk}")
+
     log_record = UserNotificationPolicyLogRecord.objects.get(pk=log_record_pk)
 
+    # TODO: uncomment this out once done investigation
+    # try:
+    #     log_record = UserNotificationPolicyLogRecord.objects.get(pk=log_record_pk)
+    # except UserNotificationPolicyLogRecord.DoesNotExist:
+    #     task_logger.info(f"perform_notification: log_record {log_record_pk} doesn't exist. Skipping remainder of task")
+    #     return
+
     user = log_record.author
     alert_group = log_record.alert_group
     notification_policy = log_record.notification_policy