Install outdoor power cable for Arlo Pro 2
If the space above the camera is readily available, I would go that route.  It would be worth the effort spent to purchase a 18 or 24&quot; 2' drill bit from the Big box store to do the full length from your porch all the way to the ceiling.  Once the drill penetrate to the other side, attach a wire to the end of the bit and pull the wire.  Then attach the power cable to the wire and pull it through.  You can also add several layer of shrink insulation to the wire where it goes through the stucco.  I do this all the time.
Before drilling with the long bit, You can drill a 1/2 hole through the stucco, insert a short plastic liner in the hole to protect the wire against abrasion.  Once the power is attached to the camera, seal the hole back up. This is similar to installing a door bell.