fix: map total_goals → totalGoals in confederationStats resolver

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/graphql/resolvers/index.ts

@@ -337,7 +337,12 @@ export const resolvers = {
         GROUP BY t.confederation
         ORDER BY appearances DESC
       `)
-      return rows
+      return (rows as Record<string, unknown>[]).map(r => ({
+        confederation: r.confederation,
+        appearances: r.appearances,
+        titles: r.titles,
+        totalGoals: r.total_goals,
+      }))
     },
     async biggestWins(_: unknown, { limit = 10 }: { limit?: number }) {
       const rows = await db.select().from(matches)