They're for bagels, actually, but yeah.
The virtue of bagels, so often overlooked by great military leaders
Also have you noticed there is in fact two
of those ships in the shot?
There no doubt, those are advent ships
I'm gonna have to disagree with you there, since in an earlier thread the large ship in the bottom of the shot was confirmed to be Vasari, since all the others (except the TEC ones) conform to the "Scarab" design ethic (and that's how Blair himself put it) of the Vasari, I doubt they are Advent.
The Advent ships are more Star Destroyer-esque from what we've seen.