If I was going to attempt that, instead of a complex repair bot, I'd be asking if the combination of a Raspberry Pi Pico, minimal sensors/comms, small ion drive, and PV can be made smaller than whatever the tracking radar's wavelength is. Launch thousands in one go in a big boring-seeming box, to a completely different orbit, release the pies and let orbital velocity do the damage on impact.

(Actually hitting is of course hard, even under power, but on the other hand if you miss you get to re-use the same impactor for another attempt perhaps every 47 minutes depending on the orbit).