Wikidata documentation on wikitech offers "ask aude or hoo" or "ask a deployer/SWAT", but the last group isn't always aware of Wikidata specifics.

Yet, there is a starting point at https://wikitech.wikimedia.org/w/index.php?title=How_to_deploy_Wikidata_code

The goal is to have a sufficient introduction for the common requests on the wiki, then we'll be able to send a mail to deployers "If you've a Wikidata specific request, you can handle it, check this page".