This PR improves the model card for AdaReasoner-7B-Non-Randomized by:
1. Adding `library_name: transformers` to the metadata, as the model is compatible with the `transformers` library (architecture: `Qwen2_5_VLForConditionalGeneration`).
2. Adding the `arxiv: 2601.18631` metadata to link the model repository to its corresponding research paper.
3. Fixing the broken paper link badge in the README (which currently points to `#`) by linking it to the Hugging Face paper page.
