server-tools/record_archiver/data/cron.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo noupdate="1">

  <record forcecreate="True" id="ir_cron_record_archiver" model="ir.cron">
    <field name="name">Records Archiver</field>
    <field name="active" eval="True"/>
    <field name="user_id" ref="base.user_root"/>
    <field name="interval_number">1</field>
    <field name="interval_type">months</field>
    <field name="numbercall">-1</field>
    <field name="doall" eval="False"/>
    <field name="model_id" ref="record_archiver.model_record_lifespan"/>
    <field name="state">code</field>
    <field name="code">model._scheduler_archive_records()</field>
  </record>

</odoo>