fix(audit L5): Sperre verwirft den Options-Cache (alloptions), damit Inventar und design_rev unter der Sperre den gespeicherten Stand lesen

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tests/Unit/TestCase.php

@@ -33,6 +33,7 @@ abstract class TestCase extends BaseTestCase
             'absint' => static fn ($value): int => abs((int) $value),
             'wp_slash' => static fn ($value) => $value,
             'wp_unslash' => static fn ($value) => $value,
+            'wp_cache_delete' => true,
             'sanitize_text_field' => static fn ($value): string => trim(strip_tags((string) $value)),
         ]);