Zoh’s taking friendly fire over the cold. A blizzard of lingering life-or-death failures after Winter Storm Fern had even Mayor Zohran Mamdani’s lefty allies blasting his fledgling administration Monday. City Councilwoman Shahana Hanif (D-Brooklyn) begged her fellow Democratic Socialists of America member Mamdani for help as a Con Edison outage that left nearly 2,000 without power in crunchy granola Park Slope stretched into its second day. The outage left locals without heat and the busy roads