Nobody has to guess. The OP can contact the maker, or have the dealer do so, and/or he can measure the thickness of the rim.
Or he can mount rim brakes and possibly live with shorter shoe life, and possibly shorter rim life if the wall is thinner than typical rim brake rims.
Of course it's hard to work from a photo, but IMO the existence of these scroll marks doesn't automatically rule this rim out for caliper brakes.
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