The Democratic Socialists of America expect Zohran Mamdani to be a party apparatchik who will strictly adhere to their radical agenda , power-hungry members of its NYC chapter declared at a meeting attended by The Post this week. The standing-room-only event, “NYC DSA 101,” at the chapter’s tiny outpost on the Lower East Side, offered a rare glimpse of NYC DSA’s tight grip on its candidates , with leaders boasting of a “symbiotic” relationship that continues long after election night. “Our