Those codes clear themselves once the issue is rectified. The controllers are simply monitoring real time electrical signals - they are in range or not. Once they’re back in range the code immediately goes away. It’s like your light switch and would be nearly as instantaneous. That’s a little oversimplified, but for the purposes of your question it’s the case.
Those markings are jaw prints. The question is was there rodent damage and then subsequent markings as well? If so, the markings aren’t that telling I routinely break parts that were already damaged because they’re damaged - often it doesn’t matter if I damage them more. I don’t carefully remove bad wheel bearings so as not to make them “more bad” - they’re going to scrap. Okay I’m sort of joking here but I’m just unsure on sequence of events and details.
It’s nearly impossible to confuse rodent damage with pulling a wire out of socket. Pulling apart results in stretch and fatigue in the copper strands, wire sheathing, and associated conduit and it pulls apart in a very distinctive way. Rodents wouldnt. Pulling it will not create nearly the same type of stretch, gnawing, pieces, material breaking and random fracturing as chewing does. We weren’t there to see it all insitu but it’s nearly impossible to confuse the two by anyone who’s seen both.
By your description it sounds like there was potentially some heated discussion - any time attitudes are flying I’m not surprised to see poorer outcomes, miscommunication, or missing data. Keep in mind the service advisors often don’t even look at your car nor have never worked on one before. So you’re getting third hand information that may be practically truthful but relayed with errors. That’s the case in a very smooth and highly cooperative situation but compounded in a more heightened one.