chore: enable verbose error logging on experiment calculations to reveal silent production errors

api/experiments.ts

@@ -85,6 +85,7 @@ export default async function handler(req: VercelRequest, res: VercelResponse) {
     if (req.method === 'PUT') {
       const { id } = req.query;
       const updates = req.body;
+      console.log('Update payload for id', id, ':', updates);
 
       const { data, error } = await supabase
         .from('experiments')