An absent N card means text/x-fossil-wiki, not markdown — fossil's wiki_render_by_mimetype is explicit — but quarry rendered those as markdown, mangling 217 of libfossil's 443 wiki artifacts ([target|label] links came out as literal text). Adds a Fossil wiki renderer (the seven rules from fossil's own wiki.wiki: paragraphs, single-level * and # lists, indented paragraphs, [target|label] links through the existing Resolver, verbatim/nowiki, HTML pass-through gated by the sanitizer), dispatches on mimetype exactly as fossil does, and stores forum posts' N card so they dispatch too. Fossil site-relative targets quarry cannot serve render their label as text rather than showing wiki source.

Also GFM completeness: footnotes and auto heading IDs, with the sanitizer policy widened to admit what goldmark actually emits (a footnotes div, not section — caught by test). check-in: 45c96a506b user: dmestas tags: trunk