Sonya Lennon has a tailor tape measure in her handbag. After three decades in the fashion industry, it doesn’t matter that her day centres around a fireside chat with the head of a global asset management company – the fundamental tool of her trade is always on hand.  Lennon is a familiar face on Irish TV, radio and the speaker circuit, but there is nothing familiar in the career she has carved out for herself or the decisions she has made. A co-presenter of RTÉ’s Off the Rails fashion show, which aired from 2008-2012, Lennon became a public figure at…