Global Account-to-Account Payment Market Size, Share, Analysis By Payment Type (Instant/Real-Time Payments, Batch & Bulk Transfers, Scheduled Payments), By Channel & Application (E-commerce Checkout, Bill Payments, P2P Transfers, B2B Corporate Payments, B2C Disbursements), By Technology (Open Banking APIs, Real-Time Clearing Rails, Proxy Directory Services), By End-User (BFSI, Retail, Utilities, Healthcare) Region & Key Players-Dynamics, Strategies & Forecast 2026-2034