refactor: align codebase with EventCrew domain and trim legacy band stack

- Update API: events, users, policies, routes, resources, migrations
- Remove deprecated models/resources (customers, setlists, invitations, etc.)
- Refresh admin app and docs; remove apps/band

Made-with: Cursor

api/database/factories/UserInvitationFactory.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Database\Factories;
+
+use App\Models\Organisation;
+use App\Models\User;
+use App\Models\UserInvitation;
+use Illuminate\Database\Eloquent\Factories\Factory;
+use Illuminate\Support\Str;
+
+/** @extends Factory<UserInvitation> */
+final class UserInvitationFactory extends Factory
+{
+    /** @return array<string, mixed> */
+    public function definition(): array
+    {
+        return [
+            'email' => fake()->unique()->safeEmail(),
+            'invited_by_user_id' => User::factory(),
+            'organisation_id' => Organisation::factory(),
+            'event_id' => null,
+            'role' => 'org_member',
+            'token' => strtolower((string) Str::ulid()),
+            'status' => 'pending',
+            'expires_at' => now()->addDays(7),
+        ];
+    }
+}