Auto-regenerate attendance records when participant reactivated

When a participant goes from suspended/frozen/inactive → active,
the listener now regenerates expected attendance records for all
their active enrollments' future sessions.

Previously, reactivated participants were invisible in attendance
because records were only generated at session creation time.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Domain/Attendance/Listeners/RegenerateAttendanceOnReactivation.php

+<?php
+
+namespace App\Domain\Attendance\Listeners;
+
+use App\Domain\Attendance\Services\AttendanceGenerationService;
+use App\Domain\Training\Events\ParticipantStatusChanged;
+use App\Domain\Training\Models\Enrollment;
+use Illuminate\Contracts\Queue\ShouldQueue;
+
+class RegenerateAttendanceOnReactivation implements ShouldQueue
+{
+    public function __construct(
+        private AttendanceGenerationService $generationService,
+    ) {}
+
+    public function handle(ParticipantStatusChanged $event): void
+    {
+        if ($event->newStatus !== 'active') {
+            return;
+        }
+
+        if (!in_array($event->oldStatus, ['suspended', 'frozen', 'inactive'])) {
+            return;
+        }
+
+        $enrollments = Enrollment::where('participant_id', $event->participant->id)
+            ->where('status', 'active')
+            ->get();
+
+        foreach ($enrollments as $enrollment) {
+            $this->generationService->generateForEnrollment($enrollment);
+        }
+    }
+}

app/Providers/EventServiceProvider.php

@@ -86,6 +86,7 @@ class EventServiceProvider extends ServiceProvider
         ],
         \App\Domain\Training\Events\ParticipantStatusChanged::class => [
             \App\Domain\Training\Listeners\SendParticipantStatusChangedNotification::class,
+            \App\Domain\Attendance\Listeners\RegenerateAttendanceOnReactivation::class,
         ],
         \App\Domain\Training\Events\EvaluationShared::class => [
             \App\Domain\Training\Listeners\SendEvaluationSharedNotification::class,