peft tensorboard safetensors LLaVa-NeXT trl sft generated_from_trainer base_model:llava-hf/llava-v1.6-mistral-7b-hf base_model:adapter:llava-hf/llava-v1.6-mistral-7b-hf license:apache-2.0 4-bit bitsandbytes region:us