Like others said, reshaping the bruised lead is the small job. Although the keel/sump joint is robust you should still take closer look at or get someone besides the yard owner to look at. If there is a new 'smile' at the front joint it has moved, but could still be tight. Worst case is you'll be looking for slow leak source next summer. Surprised you don't know keel is lead. It's all in the owner's manual.