Hub: removed dead host-based site resolving (slug == hostname could never match)
Slugs may not contain dots (validation [a-z0-9_-]), so the "WHERE slug = host"
lookup never matched — dead code + an unnecessary DB query per hub request. Removed.
Real subdomain routing would match the subdomain label against the slug (separate
feature).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@…>