Add QuCo-RAG paper to General section

[ZhishanQ]

Adding QuCo-RAG (Findings of ACL 2026, posted to arXiv Dec 22 2025) under Papers → General, in a new 2025 subsection.

QuCo-RAG is a dynamic / architecture-modifying RAG method that quantifies uncertainty using objective pre-training-corpus statistics (Infini-gram over 4T tokens) rather than model-internal signals — addressing the well-known calibration failures of confidence-based methods like FLARE and DRAGIN. Two-stage: pre-generation low-frequency-entity detection + runtime entity co-occurrence verification.

• Paper: https://arxiv.org/abs/2512.19134
• Code: https://github.com/ZhishanQ/QuCo-RAG

Tags applied: ACL Findings Architecture. Omitted the Semantic Scholar badge since the paper is too new to be indexed — happy to add it later, or feel free to drop it in during review.

Thanks!