Launching ships for sat attack... sounds kinda funny.
PDCs aren't exactly weapons, more like defenses. They can be used offensively ofc, but using them on a ship doesn't make it a combat ship.
The transport ship itself does no fighting, so it is not a warship. Would you call a ship that has a Star Destroyer on it a warship? I wouldn't. It is the same principle. Or how about a troop transport? It drops offensive troops, but is it a warship itself?