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@Regal
It's normal to have a small vertical bobble at the seam where the rim extrusion is joined. It's more pronounced on certain rims than on others (some rims are rounder than others as well). You can try and pull it out with the spoke tension, and you should if it's a long dip/bump, but if it starts affecting the evenness of the spoke tension it's maybe better to just leave it. A short ~1mm vertical bobble in that one spot is ok, you won't feel it.
The important thing is that the rim is accurately centred around the hub, i.e. it's not going up and down all the way round the rotation.