Hey Dimitrios,
There is already an issue on this that I will address as soon as I have the time
Regarding comments, we don’t have a “canonical” way to do it. However, you are free to add a comments convention to your objects by extending them with a dynamic property on the base object. It is an interesting point though and is something that is definitely on the table to officially support this for the future.
Cheers,
Izzy