MpesaConfig
constructor(gatewayId: GatewayId = GatewayId("mpesa"), displayName: String = "M-Pesa", region: String = "Kenya/Tanzania", docsPath: String = "docs/providers/mpesa.md", blurb: String = "Daraja STK push — confirmation happens on the payer's phone, no in-app SDK/UI.", capabilities: Set<Capability> = setOf(Capability.ONE_TIME_PAYMENT, Capability.WALLET), status: GatewayStatus = GatewayStatus.MOCK_MODE)