✨ Add OAuth functionality, MCP tools, and feature tests

- 🔒 Added migrations for `oauth_access_tokens`, `oauth_refresh_tokens`, `oauth_auth_codes`, `oauth_clients`, and `oauth_device_codes`.
- 🤖 Created MCP tools (Meetups, Cities, Venues, Courses, Lecturers) for managing entities with authentication and validation.
- 🛠️ Implemented Passport-backed OAuth API guard configuration and validation endpoints.
- ✅ Added comprehensive feature tests for MCP tools and OAuth functionality (access control, validation, and token-based authentication).

app/Mcp/Tools/CourseEvent/ListMyCourseEventsTool.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace App\Mcp\Tools\CourseEvent;
+
+use App\Models\CourseEvent;
+use Illuminate\Contracts\JsonSchema\JsonSchema;
+use Illuminate\JsonSchema\Types\Type;
+use Laravel\Mcp\Request;
+use Laravel\Mcp\Response;
+use Laravel\Mcp\Server\Attributes\Description;
+use Laravel\Mcp\Server\Tool;
+use Laravel\Mcp\Server\Tools\Annotations\IsReadOnly;
+
+#[IsReadOnly]
+#[Description('Listet alle vom authentifizierten Nutzer erstellten Kurs-Events (inkl. Kurs und Veranstaltungsort), absteigend nach Startdatum. Optional nach Kurs filterbar.')]
+class ListMyCourseEventsTool extends Tool
+{
+    public function handle(Request $request): Response
+    {
+        $user = $request->user();
+
+        if ($user === null) {
+            return Response::error('Nicht authentifiziert.');
+        }
+
+        $events = CourseEvent::query()
+            ->with(['course:id,name', 'venue:id,name'])
+            ->where('created_by', $user->getAuthIdentifier())
+            ->when(
+                $request->filled('course_id'),
+                fn ($query) => $query->where('course_id', $request->integer('course_id'))
+            )
+            ->orderByDesc('from')
+            ->get();
+
+        return Response::json($events);
+    }
+
+    /**
+     * @return array<string, Type>
+     */
+    public function schema(JsonSchema $schema): array
+    {
+        return [
+            'course_id' => $schema->integer()->description('Filtert die Kurs-Events auf einen bestimmten Kurs.'),
+        ];
+    }
+}