Populate wiki: Home, Architecture, Installing, FAQ Cross-links with the GitHub Pages landing page (pankajads.github.io/factfolio) in both directions. Architecture and Installing carry Mermaid versions of the landing page's three diagrams (review pipeline, privacy boundary, install decision tree) rather than duplicating docs/*.md content -- those stay the single source of truth and are linked out to instead. FAQ documents the unsigned-executable SmartScreen/Gatekeeper warning (bypass steps for both OSes) for the first time anywhere in the project.