fix: DiviModules::knowsBlock() guards the metadata method, not just the class

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

src/Integrations/Divi/Schema/DiviModules.php

@@ -96,7 +96,7 @@ class DiviModules implements DiviAdapter
         if (class_exists('WP_Block_Type_Registry') && \WP_Block_Type_Registry::get_instance()->is_registered($name)) {
             return true;
         }
-        if (! self::isAvailable()) {
+        if (! method_exists(ModuleRegistration::class, 'get_all_core_modules_metadata')) {
             return false;
         }