The {{puppetdb::server}} class of module puppetlabs-puppetdb module conditionally declares a resource {{Systemd::Unit_file['puppetdb-dlo-cleanup.service']}}, but no 'systemd' module is declared among the module's dependencies in its metadata.json file. My best guess is that the wanted module is camptocamp-systemd, since that is "approved" and popular, and it provides a resource type of that name. There is no puppetlabs-systemd on the Forge.
The puppetdb::server class of puppetlabs-puppetdb module conditionally declares a resource Systemd::Unit_file['puppetdb-dlo-cleanup.service'], but no 'systemd' module is declared among the module's dependencies in its metadata.json file. My best guess is that the wanted module is camptocamp-systemd, since that is "approved" and popular, and it provides a resource type of that name. There is no puppetlabs-systemd on the Forge.