This PR improves the dataset card by adding:
- Metadata (task category and license).
- A link to the associated paper: [Verifiable Rewards Beyond Math and Code: Lightweight Corpus-Grounded Process Supervision for Factual Question Answering](https://huggingface.co/papers/2605.29648).
- A link to the official GitHub repository.
- Sample usage instructions for downloading the index using the Hugging Face CLI, as found in the GitHub README.
Initial CorVer training data (curricula + rl_pool)
