- Add database models for subscription tiers, vendor subscriptions, add-ons, billing history, and webhook events - Implement BillingService for subscription operations - Implement StripeService for Stripe API operations - Implement StripeWebhookHandler for webhook event processing - Add vendor billing API endpoints for subscription management - Create vendor billing page with Alpine.js frontend - Add limit enforcement for products and team members - Add billing exceptions for proper error handling - Create comprehensive unit tests (40 tests passing) - Add subscription billing documentation 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Generic single-database configuration.