Not seeing "scale rot". Not really close enough to be sure, but could be a few scales that were nicked (minor & rather normal damage), like we all got "skinned knees" as kids playing. Or debris?
You could dab on some Vetericyn antiseptic ointment or diluted Betadine (povidone-iodine) but really, it's probably not even needed. This is stuff that wouldn't even show up on a 'normal' BP.