“According to inmates’ lawyers, Lewisburg staffers, and more than 40 current and former prisoners — who made similar claims in lawsuits, court testimonies, government audits, or letters and interviews with The Marshall Project and NPR — restraints are used as punishment at Lewisburg, often for those who refuse their cell assignments. Inmates have no say over who shares their cell, even if guards place them with someone who has a violent history, is from a rival gang, or is suffering from a severe mental illness.”