Refs #21707. Add TODO so we don't forget to correctly process key-onl…

…y payloads in the future.

Signed-off-by: Miguel Company <miguelcompany@eprosima.com>

src/cpp/rtps/messages/MessageReceiver.cpp

@@ -867,6 +867,7 @@ bool MessageReceiver::proc_Submsg_Data(
         uint32_t next_pos = msg->pos + payload_size;
         if (msg->length >= next_pos && payload_size > 0)
         {
+            FASTDDS_TODO_BEFORE(3, 1, "Pass keyFlag in serializedPayload, and always pass input data upwards");
             if (dataFlag)
             {
                 ch.serializedPayload.data = &msg->buffer[msg->pos];