Today, I have accidentally found there is some task linked to my
requirement but there is no trace for that. Even when I delete the link,
there is also no entry for that removal.
In the meantime, I am aware of there is no field in ticket_change table for
this. All of links are being stored at agilo_link table. However,
attachment has no field explicitly for itself as well, and I recognized it
is using comment for logging purpose.
After all, I am wondering if this is a bug (is there any plan to fix?) or
this way was never implemented before taking further step on it.