transformers safetensors peft arxiv:2406.08391 dataset:calibration-tuning/Mistral-7B-Instruct-v0.2-20k-choice base_model:mistralai/Mistral-7B-Instruct-v0.2 base_model:finetune:mistralai/Mistral-7B-Instruct-v0.2 license:apache-2.0 endpoints_compatible region:us