transformers safetensors peft arxiv:2406.08391 dataset:calibration-tuning/Mistral-7B-v0.1-20k-choice base_model:mistralai/Mistral-7B-v0.1 base_model:finetune:mistralai/Mistral-7B-v0.1 license:apache-2.0 endpoints_compatible region:us