SentinelService with four checks: unresolved [[...]] wiki-link placeholders, orphan articles (no inbound refs + not session-tagged), privacy leaks (private articles referenced from public ones), stale session-tagged articles (not updated since went_live_at). /campaigns/:id/sentinel (DM only), run_sentinel MCP tool (136 tools). Keeper profile updated: coming_soon removed, copy expanded to describe both walls (Tavern + world). session_articles FKs made deferrable (MakeSessionArticlesFksDeferrable migration). 12 new tests, 530 total green. ADR-0063.
BL-025
Shipped