feat(purchase): refactor imports and add test for InsufficientStockException handling

bootstrap/app.php

@@ -1,8 +1,8 @@
 <?php
 
 use App\Domains\Auth\Exceptions\AccountLockedException;
-use App\Domains\Ticket\Exceptions\TicketNotAvailableException;
 use App\Domains\Purchase\Exceptions\InsufficientStockException;
+use App\Domains\Ticket\Exceptions\TicketNotAvailableException;
 use App\Http\Middleware\EnsureAdminAppTenant;
 use App\Http\Middleware\EnsureScannerTenant;
 use App\Http\Middleware\EnsureTenantHasMenu;