feat: integrate Overpay payment provider (pay.overpay.io)
Full integration across bot, cabinet, admin panel and landing pages:
- Config: 16 OVERPAY_* settings (API URL, credentials, P12 cert path,
project ID, currency, amount limits, webhook path, payment methods)
- Service: overpay_service.py with httpx mTLS (P12 cert) + Basic Auth,
create_payment, get_payment, refund_payment methods
- Payment mixin: OverpayPaymentMixin with create, webhook processing,
finalize (balance credit + notifications), status check
- Model: OverpayPayment table + OVERPAY enum value
- CRUD: 9 standard operations (create, get_by_*, for_update, link)
- Bot handler: start_overpay_topup + process_overpay_payment_amount
- Handler registration: route_payment_by_method + callback registration
- Webhook: POST /overpay-webhook with DB-based anti-spoofing validation
- Cabinet: balance topup + guest payment dispatch
- Keyboard: payment method button in bot
- Admin: settings category + test payment button
- Infrastructure: payment_method_config_service, system_settings_service,
payment_verification_service, payment_search_service
- Migration 0064: create overpay_payments table
Overpay API specifics: amount as string "100.00" (not kopeks),
success status "charged", HPP redirect via resultUrl
Fringg
2c3ffc8c8a