Add to the repositories metadata an updateinfo.xml file describing security and bugfix versions
Actually the foreman repositories don't have any updateinfo.xml files in them. This file collects metadata about minor upgrades like bugfix or security fix. Some tools like yum-plugin-securiy are relying on it to apply security patches on a system.
Without this file, people using the yum plugin extensively will not apply the security fixes that foreman publish.
If you are using pulp for repository management, creating errata is easy =)
Here is for the record the pulp wiki page describing the updateinfo.xml format a little : https://www.fedorahosted.org/pulp/wiki/Errata