fix cipher desync issue

update the handshake phase to call the new method after activating the cipher, ensuring buffered data (likely from a second login attempt, GC_PHASE) is properly decrypted, and fix a logging format issue.

src/UserInterface/PythonNetworkStreamPhaseHandShake.cpp

@@ -254,6 +254,7 @@ bool CPythonNetworkStream::RecvKeyAgreementCompletedPacket()
 	Tracenf("KEY_AGREEMENT_COMPLETED RECV");
 
 	ActivateCipher();
+	DecryptAlreadyReceivedData();
 
 	return true;
 }