I didn't do anything special. Despite the bark inclusion, the bottom was pretty solid. Since then it has warped a bit on the fault line so it doesn't sit flush anymore.
I had a cedar bowl explode on me the other day, but not for this reason. I bumped the natural edge with the gouge when finishing the very bottom of the bowl. Just a dumb moment. I've glued it back together, but we'll see if it makes the cut.