chore(hubs): refresh MR hub evidence links

glossary: backlink share-of-citation

glossary: backlink machine-relations

glossary: backlink generative-engine-optimization

glossary: backlink entity-clarity

glossary: backlink earned-authority

glossary: backlink citation-architecture

glossary: backlink answer-engine-optimization

glossary: backlink ai-visibility

glossary: backlink ai-search-engine

chore(hubs): refresh MR hub evidence links

glossary: backlink share-of-citation

glossary: backlink machine-relations

glossary: backlink earned-authority

glossary: backlink citation-gap