Document precision variants and the auto-upcast inference behavior

Add bf16_backbone safetensors variant for smaller downloads

Add bf16_backbone safetensors variant for smaller downloads

Update model card to document linear softmax classifier, batch inference, confidence outputs, and ONNX export

Add trained linear softmax classifier alongside the kNN head

Add trained linear softmax classifier alongside the kNN head

Add trained linear softmax classifier alongside the kNN head

Add batch inference, per-task confidence, ONNX export

Add training procedure section

Argus v1.0