Do you archive old wallets

I have private keys from years ago to wallets that I've abandoned. Even though I don't use them and never plan to, I have a fear that I'll accidentally fund an old wallet from something that I forgot about (old exchange, someone tipping me to an old address, who-knows-what).

I was imagining some little self-hosted app on my node that checks new blocks against known archived wallets and lets me know if a transaction matches - or for larger amounts, sweeps the funds automatically.

I don't have anything like this, so I have copies of private keys and (for more recent wallets) seed phrases backed up in various places. I'm sure that I should be more organized about it, but what's the best way? I could see it getting out of hand easily and taking ages to go through everything on the regular to check balances.

I look forward to a discussion on the best way to handle this. What are your ideas/solutions?