refactor: ReleaseGate::invalidate() als einzige Stelle zum Zurücksetzen des Freigabe-Zustands; CompatibilityMatrix::locked() und ReleaseGate::lockOf() ersetzen die drei Kopien der Sperrprüfung

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

src/Integrations/Divi/Admin/DiviTab.php

@@ -160,7 +160,7 @@ final class DiviTab implements AdminTab
         }
 
         ($this->releases ?? new ReleaseStore())->add($version, Plugin::VERSION, get_current_user_id(), $report->id);
-        ReleaseGate::forget();
+        ReleaseGate::invalidate();
         $this->log?->record(
             'lit/divi-release',
             'divi',
@@ -183,7 +183,7 @@ final class DiviTab implements AdminTab
             return;
         }
 
-        ReleaseGate::forget();
+        ReleaseGate::invalidate();
         $this->log?->record(
             'lit/divi-release',
             'divi',