test: smoke scripts fail when they stop before their last check

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

tests/Integration/divi-read-smoke.sh

@@ -18,7 +18,7 @@ cleanup() {
   done
   cleanup_app_passwords_for "$ADMIN_LOGIN"
 }
-trap cleanup EXIT
+trap 'rc=$?; cleanup; guard_exit "$rc" || exit $?' EXIT
 
 # Creates a draft page from a fixture file as the admin (no kses re-serialization) and prints its ID.
 create_page() { # $1 = fixture file, $2 = title
@@ -98,4 +98,4 @@ pass "content-get points to the Divi tools; Divi 4 content is refused"
 [ "$(content_hash "$PAGE_ID")" = "$BEFORE" ] || fail "reading changed post_content"
 pass "post_content unchanged after reading"
 
-echo "ALL CHECKS PASSED"
+finish