feat: implement Telepagos webhook handling with request validation and service integration

app/Domains/Purchase/Models/TelepagosPayment.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Domains\Purchase\Models;
+
+use Illuminate\Database\Eloquent\Attributes\Fillable;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+#[Fillable([
+    'compra_id',
+    'cuit_buyer',
+    'cvu_buyer',
+    'amount',
+    'concept',
+    'operation',
+    'operation_id',
+    'transaction_id',
+    'qr_order_id',
+    'link_id',
+])]
+class TelepagosPayment extends Model
+{
+    use HasFactory;
+
+    protected $table = 'telepagos_payments';
+
+    protected function casts(): array
+    {
+        return [
+            'compra_id' => 'integer',
+            'amount' => 'decimal:2',
+        ];
+    }
+
+    /**
+     * @return BelongsTo<Purchase, $this>
+     */
+    public function compra(): BelongsTo
+    {
+        return $this->belongsTo(Purchase::class, 'compra_id');
+    }
+}