Mayor Zohran Mamdani officially rolled out his $124.7 billion spending plan Tuesday as he patted himself on the back for closing a so-called multibillion-dollar budget gap with short-term fixes — but included a menu of hidden fee hikes. Fiscal watchdogs poked holes in Hizzoner’s cheers that his first-ever budget was “evidence of a new era of government in our city” as his administration touted numerous ways the city would hold onto $1.7 billion over the next two years.