peft safetensors trl sft generated_from_trainer dataset:generator dataset:HachiML/Hachi-Alpaca-Mixtral-8x22B-Instruct-v0.1 base_model:mistralai/Mistral-7B-Instruct-v0.2 base_model:adapter:mistralai/Mistral-7B-Instruct-v0.2 license:apache-2.0 region:us