feat: complete email infrastructure with queue, templates, logging, and API

Adds the full transactional email system:
- Redis queue (QUEUE_CONNECTION=redis), SES config in .env.example
- 3 migrations: organisation_email_settings, organisation_email_templates, email_logs
- EmailTemplateType and EmailLogStatus enums with Dutch defaults
- EmailService as central entry point for all email sending
- SendTransactionalEmail queued job with retries and idempotency
- TransactionalMail mailable with responsive HTML + plain text templates
- Organisation-level branding (colors, logo, footer, reply-to)
- Per-type template overrides with {variable} substitution
- Email log with filtering by status, type, date range, recipient
- Preview and send-test endpoints for template management
- API endpoints: email-settings, email-templates (CRUD), email-logs (read-only)
- Integrated into existing flows: invitations, password reset, email
  verification, registration approval/rejection
- 37 new tests across 4 test files, all existing tests updated

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

api/tests/Feature/Api/V1/PasswordResetTest.php

@@ -4,12 +4,13 @@ declare(strict_types=1);
 
 namespace Tests\Feature\Api\V1;
 
+use App\Enums\EmailTemplateType;
+use App\Jobs\SendTransactionalEmail;
 use App\Models\User;
-use App\Notifications\ResetPasswordNotification;
 use Illuminate\Foundation\Testing\RefreshDatabase;
 use Illuminate\Support\Facades\Hash;
-use Illuminate\Support\Facades\Notification;
 use Illuminate\Support\Facades\Password;
+use Illuminate\Support\Facades\Queue;
 use Tests\TestCase;
 
 class PasswordResetTest extends TestCase
@@ -20,7 +21,7 @@ class PasswordResetTest extends TestCase
 
     public function test_forgot_password_returns_success_for_existing_email(): void
     {
-        Notification::fake();
+        Queue::fake();
 
         $user = User::factory()->create(['email' => 'jan@voorbeeld.nl']);
 
@@ -31,11 +32,16 @@ class PasswordResetTest extends TestCase
 
         $response->assertOk();
 
-        Notification::assertSentTo($user, ResetPasswordNotification::class);
+        Queue::assertPushed(SendTransactionalEmail::class, function ($job) {
+            return $job->recipientEmail === 'jan@voorbeeld.nl'
+                && $job->type === EmailTemplateType::PASSWORD_RESET;
+        });
     }
 
     public function test_forgot_password_returns_same_success_for_nonexisting_email(): void
     {
+        Queue::fake();
+
         $response = $this->postJson('/api/v1/auth/forgot-password', [
             'email' => 'onbekend@voorbeeld.nl',
             'app' => 'app',