transformers safetensors mistral text-generation pruna-ai conversational base_model:unsloth/mistral-7b-instruct-v0.3-bnb-4bit base_model:quantized:unsloth/mistral-7b-instruct-v0.3-bnb-4bit autotrain_compatible text-generation-inference endpoints_compatible 4-bit bitsandbytes region:us