Spamfilter configuration is not updated when changing the policy through API

Summary

When updating a spam policy through the API with mail_policy_update, there is no trigger to update the config files that are based on this policy.

Steps to reproduce

  1. Send POST request to remote/json.php?mail_policy_update

Correct behaviour

The configuration should be updated. This does happen when making a change to the policy through the UI:

     function onAfterDatalogSave($insert = false) {
        global $app;

        if(!$insert && $this->record_has_changed){
            $spamfilter_users = $app->db->queryAllRecords("SELECT * FROM spamfilter_users WHERE policy_id = ?", intval($this->id));

            if(is_array($spamfilter_users) && !empty($spamfilter_users)){
                foreach($spamfilter_users as $spamfilter_user){
                    $app->db->datalogUpdate('spamfilter_users', $spamfilter_user, 'id', $spamfilter_user["id"], true);

                    // check if this is an email domain
                    if(substr($spamfilter_user['email'],0,1) == '@') {
                        $domain = substr($spamfilter_user['email'],1);

                        // Nothing special to do for a domain
                    }
                }
            }
        }
    } 

Environment

ISPConfig version: 3.2.11

References

https://forum.howtoforge.com/threads/rspamd-spamfilter-policy-conf-file-not-update-on-spamfilter-policy-score-update-via-api.91491/#post-452119