even the system that does that would be insane to run on the same voltage as the condenser (make-cold part). computers are cheapest to build cheapest to run and most durable for low voltage. so basically you'd have the wall plug go straight to a split where one side (the smart bits) steps down to like 1/50th-1/100th depending on your wall voltage, and the other runs the fridge parts.

I could see it easily costing 200 in parts and labor to do it well. electronics get weird with temperature, you'd need to build the cameras into the walls without sabotaging insulation, defrost cycles mean water exposure. its not completely trivial. and that's not what most smart fridges do anyway.