If you damaged the roots, all you can do is wait. there's no secret magic product out there to heal your plant.
you don't want more of anything, you want the amount that creates the happiest plant. don't overreact. Just keep it healthy. dousing with nutes or other additives may not be the best option, right now.
Rethink how you pot up... find a better way or better pot. Sometimes it's the pot's fault if you can't easily loosen it up to slide out. I cut some seedling pots down the side for that exact reason. It was impossible to gently pull the plant out, otherwise. Also, the substrate sticks together better if you do it after an irrigation and not when it has dried significantly.
I got new seedling pots and i think i need to do the same type of thing. I'm just going to cut out the bottom and nest it.
The plant should slide out easily of any seedling pot. They are plenty sturdy enough later on to give a gentle tug.