I think it's pretty clear. If you're not filtering, you're liable. If you are and something transpires, they'll fight your legal battle for you which is probably better than any monetary indemnity clause. I assume this is for enterprise users where it actually matters.
Looks like this code in https://github.com/ChRis6/circuit-simulation/blob/2e45c7db01... is older then the GPL code in question or provided by the example. Uh oh, did we discover something? Who actually owns this code because this code predates the code in question by a calendar year using git blame, by a different author, and with no license attached to the oldest code. Is it possible the code in the codeium.com example is relicensed and not GPL code at all?