Based on what you have written and shown, with that keyboard cover/enclosure, I would not be surprised if there is absolutely NOTHING wrong with this MBA.
If it were my MBA, I would open that keyboard apart and dry/clean all of that. I think your MBA is fine. I understand the precaution, but I don't think reassembling it all today will bring a different result from waiting a week or year.
It is one amazing little Mac isn't it? What a great computer. Best wishes for a speedy and COMPLETE recovery.