The optional dependency group named hf no longer exists in pyproject so uv was refusing to sync with extra hf. Transformers and torch are now part of the default dependency set so a plain sync is enough.
feat: prepare project for Hugging Face Spaces deploy
Adds the Spaces YAML frontmatter to README and flips the Dockerfile defaults to install the heavy transformer stack and cache HF assets under /tmp so the container works under the Spaces non-root user.
feat: prepare project for render free tier deployment
