I'm still learning Line of Sight and Obstruction and all that jazz....

Can the Jaina's Light title let that corvette shoot through allied ships, since the attacks are never obstructed? What about other enemy ships?

If the enemy ship or squadron is at range, any ship can attack through an alied or enemy ship, the only thing is that the attack is obstructed (you have to remove one die from your pool before rolling) as if line of sight is traced through an obstacle.

The only difference for Jaina's Light is that in that case the attack is not obstructed so you can attack with your full armament