transformers safetensors qwen2 text-generation mergekit merge conversational arxiv:2403.17887 arxiv:2309.00071 base_model:Qwen/Qwen2-7B-Instruct base_model:finetune:Qwen/Qwen2-7B-Instruct license:apache-2.0 autotrain_compatible text-generation-inference endpoints_compatible region:us