generate
fun generateSecureFramesV2(sdjwtPresentation: String, targetBytesPerQR: Int = 400): SecureQRGenerator.Result
V2 transport (JSON{vc1,vc2,vc3} + zlib + b64url), then generate QR frames.
SD-JWT combined presentation: issuerJWS~disc1~...~discN~kbJWS?
Parameter sdjwtPresentation: The combined presentation string
Returns: v2 transport payload and QR frames