4-layer-citation-verification-zero-hallucination-pattern

AutoResearchClaw uses a 4-layer citation verification chain: arXiv ID → CrossRef/DataCite DOI resolution → title string match → LLM relevance check. This is production-grade anti-hallucination for academic references. The Oracle stack had zero citation integrity before this integration. Expose as a standalone MCP tool so any Oracle agent can verify references outside the full paper pipeline.