/etc/cron.d/maas_remote_syslog_compress is in maas-region-api 2.4.0~beta2-6865-gec43e47e6-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # Compress log files not changed in more than 48 hours:
30 4 * * * root find /var/log/maas/rsyslog -type f -mtime +2 -exec bzip2 '{}' \;
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