peft tensorboard safetensors mistral alignment-handbook generated_from_trainer trl dpo dataset:HuggingFaceH4/ultrafeedback_binarized base_model:mistralai/Mistral-7B-Instruct-v0.2 base_model:adapter:mistralai/Mistral-7B-Instruct-v0.2 license:apache-2.0 4-bit bitsandbytes region:us