transformers tensorboard safetensors qwen2 text-generation alignment-handbook trl sft generated_from_trainer conversational dataset:preference-data base_model:Qwen/Qwen1.5-0.5B-Chat base_model:finetune:Qwen/Qwen1.5-0.5B-Chat license:other autotrain_compatible text-generation-inference endpoints_compatible region:us