I would be very surprised if that left PRS in that condition! That would surely have been picked up by any of the QC checks before it moves on to 'buffing' for example, before they added the hardware. Its not just '1' final check as its put in the case that missed it, but would have been picked up at 'numerous' other QC check points after it left the spray booth.
I don't know how old your guitar is to know how long it could have been hanging around at Sweetwater, whether it was out on display for months allowing customers to come in, play it and possibly knock the edge on a stand, against other guitars hanging up etc. If its hung sideways (as some do to cram more guitars into a smaller area), It may of knocked against something on the edge causing a bit of damage. There is often a LOT of potential for guitars to be less than 'perfect' after they leave PRS and their 'final' check as they are cased ready to ship out. All the 'hangtag' states is that the guitar was 'passed' to be shipped on that specific day.
My latest guitar for example, was fit to leave on 11th Jan 19. I received it 26th June 19 and the shop said it came into them in April. That's nearly 6months after it was cased - it was then shipped to PRS Europe for a Rep to take round to different stores who may of picked it up out of its case, eventually selected by a store for them to sell who would then handle it to take photo's to upload on their internet pages, may even of been hung on the wall for months for customers to try it before buying (or just try it because its a 'Special' guitar) and then do their usual check, set-up and clean before it gets shipped to the customer - in this case Me.
Point is, all the hangtag states is that the guitar was checked and passed as fit to leave PRS on the day indicated on the hangtag. If your guitar is older than mine was - a 2018 or older, that means it could have been hanging in store for months ans months. The 'damage' could have occurred because of the way it was 'handled' and displayed. If it's hung sideways for example to fit more guitars in a smaller area, the edge could of been knocked by people taking it down and putting it back up or even by the guitar it was next to as that was taken down or put back.
I cannot believe that this wasn't picked up by the buffers, by the person that installs the hardware, the person that does the set-up and the person that gives it a final check before its cased ready to go to a retailer. There are numerous other steps after the spray booth that are also part of the QC process too. If I had to put money on it, I would think that has occurred between it leaving PRS and you receiving it. If it was something off in the spray booth (for example) it wouldn't just affect the edges and it certainly would have been picked up by the person who buffed it. Even if it wasn't, the chances that it was missed as the guitar moved through the final areas and then sent out like that is very unlikely.
Anyway, I hope they sort it out for you and I do think that would be the best option - even if you have to go without for a while. You know exactly what you are getting, how it sounds and plays - even the quality of the grain too if that matters to you.