fix: add empty migration, fix db namespace

We need to add the /app prefix because that's the path where our project folder
is mounted inside the container.

Author: KilianTrunk

testbench.yaml

@@ -2,7 +2,7 @@ laravel: '@testbench'
 
 env:
   - DB_CONNECTION=sqlite
-  - DB_DATABASE=workbench/database/database.sqlite
+  - DB_DATABASE=/app/workbench/database/database.sqlite
   - APP_KEY=base64:ZQvPGC7uVADkjOgtGIIuCI8u3/Pzu+VaRObIbHsgjCc=
   - APP_ENV=local
   - APP_DEBUG=true

workbench/database/migrations/2025_08_21_112822_create_permission_tables.php

@@ -0,0 +1,17 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        // Intentionally left blank.
+        // This migration exists only to avoid a duplicate "permissions" table creation.
+    }
+
+    public function down(): void
+    {
+        // No-op.
+    }
+};