transformers safetensors qwen2 text-generation alignment-handbook trl dpo generated_from_trainer conversational dataset:xinlai/Math-Step-DPO-10K base_model:Qwen/Qwen2-Math-7B-Instruct base_model:finetune:Qwen/Qwen2-Math-7B-Instruct license:apache-2.0 autotrain_compatible text-generation-inference endpoints_compatible region:us