okx-a2a-payment

DEPRECATED legacy alias — a2a-pay support has been merged into `okx-agent-payments-protocol` (see `references/a2a_charge.md`). This stub exists only so that legacy invocations referencing the old name resolve to a meaningful redirect. If you land here, immediately load `okx-agent-payments-protocol` via the Skill tool and follow it instead. Do NOT execute any payment logic from this stub. All paymentId / a2a_... / payment-link / payment-status triggers now route directly to `okx-agent-payments-protocol` (Path B in its SKILL.md).