transformers safetensors qwen2 text-generation generated_from_trainer trl cpo unsloth arxiv:2401.08417 base_model:rawsh/mirrorqwen2.5-0.5b-SimPO-1 base_model:finetune:rawsh/mirrorqwen2.5-0.5b-SimPO-1 autotrain_compatible text-generation-inference endpoints_compatible region:us