Temp: log raw CMSG_AUTH_SESSION payload for 12.1.0 layout reversal

src/server/game/Server/Packets/AuthenticationPackets.cpp

@@ -75,6 +75,18 @@ namespace WorldPackets::Auth
 
     void AuthSession::Read()
     {
+        std::string rawHex;
+        rawHex.reserve(_worldPacket.size() * 3);
+        static constexpr char hexDigits[] = "0123456789ABCDEF";
+        for (std::size_t i = 0; i < _worldPacket.size(); ++i)
+        {
+            uint8 b = _worldPacket[i];
+            rawHex.push_back(hexDigits[b >> 4]);
+            rawHex.push_back(hexDigits[b & 0xF]);
+            rawHex.push_back(' ');
+        }
+        TC_LOG_INFO("network", "CMSG_AUTH_SESSION raw (%zu bytes): {}", _worldPacket.size(), rawHex);
+
         uint32 realmJoinTicketSize;
 
         _worldPacket >> DosResponse;