- Merge ImageService into MediaService with WebP variant generation,
DB-backed storage stats, and module-driven media usage discovery
via new MediaUsageProviderProtocol
- Add merchant users admin page with scoped user listing, stats
endpoint, template, JS, and i18n strings (de/en/fr/lb)
- Fix merchant user metrics so Owners and Team Members are mutually
exclusive (filter team_members on user_type="member" and exclude
owner IDs) ensuring stat cards add up correctly
- Update billing and monitoring services to use media_service
- Update subscription-billing and feature-gating docs
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>