Nothing lasts forever. And so, this is my final column for the Portland Press Herald. For more than 10 years, I have written about Boston sports in this space. What a time to do it. This is “The Golden Age of Boston Sports,” an unmatched stretch of success that has seen the duck boats roll along the Charles River for 13 championships since 2001. The 2017 parade for the Super Bowl champion Patriots was held on a Tuesday, hours after a snowstorm ripped through Boston.