I think you're confused. An original digital photograph is no more intrinsically "edited" than a photograph taken on film. Would you say a film photo is edited just because of the limits of the film grain? Because the limitations of a digital sensor's pixels are really no different.

So no. Not all digital photos can accurately be said to be edited; there is such a thing as an original digital file, and a distinction to be drawn between that file and an edited version of the original.