{{-- Razorpay Checkout SDK — REQUIRED to load from checkout.razorpay.com
per Razorpay's official integration documentation. Self-hosting
this script is explicitly not supported by Razorpay: the SDK
signs payment requests against their CDN-served version to
prevent tampering, and is updated server-side without buyer
intervention. Only loads on tenants who have enabled Razorpay
as a payment gateway. --}}