- Add subscription fields to organizations (status, plan, trial_ends_at, etc.)
- Add subscription middleware for access control
- Add /auth/me returns subscription info
- Add admin endpoints for subscription management:
- GET/PUT /admin/organizations/:id/subscription
- POST /admin/organizations/:id/pause
- POST /admin/organizations/:id/activate
- POST /admin/organizations/:id/extend-trial
- GET /admin/subscriptions (with filters)
- New orgs get 14-day trial automatically