feat: fase 2 backend — crowd types, persons, sections, shifts, invite flow

- Crowd Types + Persons CRUD (73 tests)
- Festival Sections + Time Slots + Shifts CRUD met assign/claim flow (84 tests)
- Invite Flow + Member Management met InvitationService (109 tests)
- Schema v1.6 migraties volledig uitgevoerd
- DevSeeder bijgewerkt met crowd types voor testorganisatie

api/app/Http/Resources/Api/V1/PersonCollection.php

@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Resources\Api\V1;
+
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\ResourceCollection;
+
+final class PersonCollection extends ResourceCollection
+{
+    public $collects = PersonResource::class;
+
+    public function toArray(Request $request): array
+    {
+        return [
+            'data' => $this->collection,
+        ];
+    }
+
+    public function with(Request $request): array
+    {
+        $persons = $this->collection;
+
+        $byCrowdType = $persons->groupBy(fn ($person) => $person->crowd_type_id);
+
+        $crowdTypeMeta = [];
+        foreach ($byCrowdType as $crowdTypeId => $group) {
+            $crowdTypeMeta[$crowdTypeId] = [
+                'approved_count' => $group->where('status', 'approved')->count(),
+                'pending_count' => $group->where('status', 'pending')->count(),
+            ];
+        }
+
+        return [
+            'meta' => [
+                'total' => $persons->count(),
+                'approved_count' => $persons->where('status', 'approved')->count(),
+                'pending_count' => $persons->where('status', 'pending')->count(),
+                'by_crowd_type' => $crowdTypeMeta,
+            ],
+        ];
+    }
+}