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/database/factories/CompanyFactory.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Database\Factories;
+
+use App\Models\Company;
+use App\Models\Organisation;
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+/** @extends Factory<Company> */
+final class CompanyFactory extends Factory
+{
+    /** @return array<string, mixed> */
+    public function definition(): array
+    {
+        return [
+            'organisation_id' => Organisation::factory(),
+            'name' => fake('nl_NL')->company(),
+            'type' => fake()->randomElement(['supplier', 'partner', 'agency', 'venue', 'other']),
+            'contact_name' => fake('nl_NL')->name(),
+            'contact_email' => fake()->companyEmail(),
+            'contact_phone' => fake('nl_NL')->phoneNumber(),
+        ];
+    }
+}