This is "not unlike" fixing a PCB trace. How would you do that?

What about globbing some eutectic solder over the traces (even though it
shorts them), then using "something" to break the solder into individual
"strands" while it's still liquid?

I'm wondering whether zebra strip would be conductive enough? It might not
matter over such a short (ar, ar) distance.

I wish you success. And if this happened this morning, please put it aside
and relax. Work on something else, something easy, and try to forget about
this problem for the time being.