{"message":"🚀 SSLCommerz Subscription Payment Server","version":"2.0.0","mode":"SANDBOX","swaggerDocs":"/api-docs","baseUrl":"https://localhost:5000","endpoints":{"POST /api/payment/init":"⭐ Payment করো (শুধু এই 1টা API call করো — বাকি সব auto)","GET /api/subscription/plans":"Plans ও Pricing দেখো","GET /api/subscription/user/:userId":"Active Subscription দেখো","GET /api/subscription/user/:userId/history":"Subscription History","POST /api/subscription/calculate-price":"Price Preview","POST /api/subscription/check-validity":"Subscription Valid কিনা চেক করো"}}