feat: add privacy-safe server diagnostics

infra/predeploy-check.sh

@@ -13,5 +13,5 @@ fi
 
 npm test
 npm run build
-sh -n infra/backup-postgres.sh infra/restore-check.sh
+sh -n infra/backup-postgres.sh infra/restore-check.sh infra/diagnose-server.sh
 printf '%s\n' 'predeploy-check: static, test, build, and script gates passed'