[DDW-1102] Refactor and address review comments (extendedPublicKeyResponse)
[DDW-1102] Refactor and address review comments (extendedPublicKeyResponse)

input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus