Remove large cache files and update .gitignore to prevent future large file commits

Update model to cl-nagoya-sup-simcse-ja-nss-v1_0_8_4, add new standard name mapping functionality in prediction process, and enhance data loading in sentence transformer service.

Update model to cl-nagoya-sup-simcse-ja-nss-v1_0_8_3, add new data files, and enhance startup process with directory creation and model loading.