Variable NSPAM_MODEL_URL`Const`

NSPAM_MODEL_URL: "https://huggingface.co/barrydeen/nspam/resolve/29f76c80010554f64ef385608b20aad50ea0498e/v2.4"

The Hugging Face URL of the nspam model files, pinned to a commit so upstream retrains can't change scores