In the immediate aftermath of Hurricane Katrina, Chris Rose’s column in The Times-Picayune gave voice to the grief, frustration, anger and absurdity of a battered New Orleans. Even as he shouldered the burden of a city’s collective trauma — thousands of readers reached out to him — he was bedeviled by alcohol, depression, anxiety and an addiction to prescription painkillers. He left the paper in 2009, then bounced around to other local media outlets. He hosted a French Quarter walking tour. He w