Want to follow-up on this for anyone who has a similar issue in future. After taking that photo, I slathered the entire joint and bungees with some 3M Marine Adhesive Sealant - Fast Cure 5200. I let it cure for two days before diving. On the second dive the Adhesive Sealant split right above the split in the fin, but held in-place around the bungees. The repair held for exactly 125 dives over about four months before giving way and flopping around. I was able to finish that dive without difficulty.
I think there's something positive to be said about the quality of the materials Scubapro uses for their products—not just for these fins—that would enable them to withstand a repair that lasts as long as this one did. So much modern scuba equipment (fins, BCDs, masks, et cetera) is often garbage once broken.
