- New apps/guides app with GuidePage model and audience mapping by wiki path
- sync_guides management command: one-way read-only sync from wikijs DB
- Read-only wikijs_ro DB role + WIKI_DB_* env config (secrets, gitignored)
- Markdown rendering with bleach sanitisation; rewrites internal guide links
to the portal help root and wiki image paths to WIKI_PUBLIC_BASE
- /portal/help/ (buyer) and /ops/help/ (ops) index + detail views with
role-based audience filtering (404 on cross-role guides)
- Help nav item added to both portal base templates
- Tests: audience filtering, markdown sanitisation, link rewriting, sync command