Five things you need to know, and what's all this about Threads?

Good morning, Boston. I'll be heading into the office today on the Blue Line for the first time since the Sumner Tunnel closed. Here's hoping things go smoothly, and here are the five things you need to know in Boston business news to start your Tuesday.Boston Mayor Michelle Wu is proposing a property tax break of up to 75% for building owners to convert their downtown office properties into apartments or condos, Greg Ryan reports.Jenny Hellwig reports that Truly Hard Seltzer, which is owned&hel