transformers safetensors llama text-generation alignment value alignment AI safety safety LLM history conversational dataset:PKU-Alignment/ProgressGym-HistText dataset:PKU-Alignment/ProgressGym-TimelessQA arxiv:2406.20087 base_model:PKU-Alignment/ProgressGym-HistLlama3-8B-C019-pretrain-v0.2 base_model:finetune:PKU-Alignment/ProgressGym-HistLlama3-8B-C019-pretrain-v0.2 license:cc-by-4.0 autotrain_compatible text-generation-inference endpoints_compatible region:us