feat(ticket): implement ticket generation on purchase payment and add related tests

app/Domains/Purchase/Events/PurchasePaid.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace App\Domains\Purchase\Events;
+
+use App\Domains\Purchase\Models\Purchase;
+use Illuminate\Foundation\Events\Dispatchable;
+use Illuminate\Queue\SerializesModels;
+
+class PurchasePaid
+{
+    use Dispatchable, SerializesModels;
+
+    public function __construct(public readonly Purchase $purchase) {}
+}