sentence-transformers safetensors bert sentence-similarity feature-extraction generated_from_trainer dataset_size:1382 loss:CoSENTLoss arxiv:1908.10084 base_model:sentence-transformers/all-MiniLM-L12-v2 base_model:finetune:sentence-transformers/all-MiniLM-L12-v2 autotrain_compatible text-embeddings-inference endpoints_compatible region:us