“The class-action lawsuit, filed Wednesday in San Diego federal court, alleges that immigrants at Otay Mesa Detention Center are paid at most $1.50 per day, and sometimes not paid at all, for their work as kitchen staff, janitors, barbers and various other roles. It further alleges that the facility doesn’t provide all of the basic necessities that detainees need for daily life, such as soap, which means they have to work in order to buy those items at the commissary.”