Consulting giant McKinsey has agreed to a $573 million settlement in a lawsuit over the company’s work advising Purdue Pharma and other drugmakers to aggressively market highly addictive opioid painkillers. The deal, made with 47 states, Washington, D.C., and five territories, is the first national settlement as part of sweeping litigation filed by state, county and local officials in recent years to hold companies responsible for the devastating opioid epidemic.