fix(nav): Change Compliance SDK icon from database to shield

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

admin-v2/lib/navigation.ts

@@ -265,7 +265,7 @@ export const navigation: NavCategory[] = [
   {
     id: 'compliance-sdk',
     name: 'Compliance SDK',
-    icon: 'database',
+    icon: 'shield',
     color: '#8b5cf6', // Violet-500
     colorClass: 'compliance-sdk',
     description: 'SDK-Kataloge, Risiken & Massnahmen',