transformers safetensors gemma feature-extraction medical biology retrieval LLM en dataset:MedRAG/textbooks dataset:MedRAG/pubmed dataset:MedRAG/statpearls dataset:mteb/raw_biorxiv dataset:mteb/raw_medrxiv dataset:ms_marco dataset:BMRetriever/biomed_retrieval_dataset arxiv:2404.18443 license:mit text-generation-inference endpoints_compatible region:us