drawais/Nemotron-3-Nano-4B-W4A16

Add needle-1M-bench 50K score: 80%% (5/5 paper-anchored, 3/5 synthetic)

Fix config.json: replace Python-extension Infinity with strict-JSON 1e30 in time_step_limit

Initial upload: Nemotron-3-Nano-4B INT4 W4A16 with attribution

initial commit