Fix config_name=None breaking push_to_hub + use cu129 nightly index

Trim prompt modes to official v2 ones (document, free)

Switch back to nightly vLLM, add addict + matplotlib deps

Use stable vLLM (>=0.15.1) instead of nightly for DeepSeek-OCR-2

Add DeepSeek-OCR-2 vLLM script (rewrite from fixed v1 pattern)

Fix: Remove pyarrow, use huggingface-hub without extras, pin datasets>=4.0.0

Fix: Force redownload to avoid dataset caching issues

Fix: Constrain pyarrow to <18.0.0 for datasets compatibility

Fix: Add pyarrow dependency for datasets compatibility

Add DeepSeek-OCR-2 script with Visual Causal Flow architecture (testing)