- Add comprehensive OxaPay payment provider with invoice creation, webhook processing, and subscription status sync
- Implement conditional payload fields (to_currency, callback_url) based on configuration
- Create universal sync command for all non-recurring payment providers
- Add subscription model fields for payment tracking
- Implement proper status mapping between OxaPay and Laravel subscription states
- Add webhook signature validation using HMAC SHA512
- Add unified payment provider architecture with contract-based design
- Implement 6 payment providers: Stripe, Lemon Squeezy, Polar, Oxapay, Crypto, Activation Keys
- Create subscription management with lifecycle handling (create, cancel, pause, resume, update)
- Add coupon system with usage tracking and trial extensions
- Build Filament admin resources for payment providers, subscriptions, coupons, and trials
- Implement payment orchestration service with provider registry and configuration management
- Add comprehensive payment logging and webhook handling for all providers
- Create customer analytics dashboard with revenue, churn, and lifetime value metrics
- Add subscription migration service for provider switching
- Include extensive test coverage for all payment functionality
