That's a real shame - feel for you
. Picked mine up on Friday with same wheels and I've been concerned about kerbing having done it a couple of times with diamond cut alloys on my last car.
I have been thinking about rim protectors and looking at Allygators which seem much better than the stick on type.
Understand your concern about the tyre but FWIW I wouldn't replace the tyre. The impact is unlikely to have damaged the casing at such low speed and seems cosmetic, at least to me. Tidy up the rim and probably only you will notice it or perhaps ask a tyre specialist what they think. When I came to sell my Golf both dealers and the eventual buyer said that my kerbing damage was so minor that they weren't concerned - but I knew it was there!