I would not be as concerned except my wife has same car and the dealer replaced her front rotors same as mine and new pads. Her rotors do not show these groves . Only difference is her pads are the newest pert number 673012383 and mine are about two previous part numbers back 673012041.
I will say when I looked at these pads Before I put them on the pad material looked a bit textured like stone not smooth like other brake pads I have had , no damage they were in brembo packaging Maserati box. I looked up other pads same part number online and they also had same texture so I assumed this how they’re supposed to be. I’m wondering if this is the difference between mine and my wife’s rotors ?