Follow-up:
For navigation ease, here's the link to Zach's 2017 keel repair. I'm convinced we have the same situation, except our visible seepage is at the aft end of the keel instead of the forward end.
viewtopic.php?f=4&t=1338Interestingly, the leak rate has been gradually slowing down. There's some yellowish gunk solidifying where the water has been dripping into the bilge sump. No idea yet if it's marine growth or some kind of goo coming out of the resin in the keel, but the flow rate is tapering off. We hauled the boat in February for bottom paint, internal halyards, partial centerboard rebuild, and some other stuff. Splash day was Feb 24. The bilge pump was running about once every 4 hours at first. I started tracking it carefully on April 10 when it was triggering once every 10 hours. Now it's only in the once per week range. Screenshot of the bilge pump counter attached below.