2b4eeadbbb
- Add subscription_plan (free/pro/enterprise) with free as default - Add subscription_status (active/cancelled/expired) - Add subscription_expires_at for expiration tracking - Add max_projects quota (free: 3, pro/enterprise: unlimited) - Add max_storage_gb and used_storage_gb for storage tracking - Backward compatible with existing code (all new fields have defaults) Phase 4 Task 9/68 completed