I would say run a Paul Chain Keeper on your BB, but I think you have a press fit BB so it won't work :(
If worse comes to worse - switch to a braze-on front derailleur (with an adaptor) and use a k-edge braze-on chain catcher.
Yep, the Paul would be perfect if I had outboard BB, but indeed this is press fit.
The braze-on front der and adapter/K-Edge solution was exactly what I was just researching. I may fabricate my own attempt for now but if I really want my insurance, that is the way to go I think.
This past weekend I switched to a braze-on FD and it’s was so much easier to align the derailleur cage with the crank set than my old clamp-on version. The adapter has a slot, instead of a single mounting hole, allowing the seat tube clamp to be set and stay in place while I adjusted the FD's height/pivot with the mounting screw (less rubbing and clamping on my bikes carbon frame). Also, the adapter clamp doesn't have to move when I switch between different sized chain rings or even a new derailleur and, as a bonus, there is now one more part that I can "borrow" from my wife's road bike :)