Note that the fab needs to have a shorting bar across the traces, just past the card edge. That is, they'll fab it slightly too long, with shorting copper across the traces. That's why you see thin protrusions on the above pictured fingers. When plating is done, the shorting area is cut off and the edge is chamfered for ready insertion.
They should add this themselves -- but just understand, you won't get precisely the shape you had on the drawing, that little protruding tip is part of the process. And they need the area there to work on, so you can't have any other board area beyond the plane of the connector.
Hard gold is usually 30uin, BTW. What thickness you choose depends on how much wear resistance you need -- for one or two insertions, yeah, even regular ENIG is passable. But beware, once the gold wipes off, exposing nickel, it's quickly downhill from there, as nickel has higher resistance, and has a surface oxide which is a semiconductor (leading to small rectification effects -- "passive IMD" in RF).
Tim