feat(cart): implement restoration and reservation of source cart on expired checkout modification

app/Domains/Catalog/Services/StockReservationService.php

@@ -118,6 +118,37 @@ class StockReservationService
             ]);
     }
 
+    public function restore(CartItem $cartItem, CatalogItem|Variant $selection): void
+    {
+        DB::transaction(function () use ($cartItem, $selection): void {
+            $requirements = $this->inventory->requirementsFor(
+                $selection,
+                (int) $cartItem->cantidad,
+            );
+            $activeReservations = StockReservation::query()
+                ->where('cart_item_id', $cartItem->getKey())
+                ->where('status', StockReservation::STATUS_ACTIVE)
+                ->lockForUpdate()
+                ->get()
+                ->keyBy('inventory_id');
+
+            $hasCompleteReservation = collect($requirements)->every(
+                fn (int $quantity, int $inventoryId): bool => (int) ($activeReservations->get($inventoryId)?->quantity ?? 0) === $quantity,
+            );
+
+            if ($hasCompleteReservation) {
+                return;
+            }
+
+            if ($activeReservations->isNotEmpty()) {
+                throw new \InvalidArgumentException('La reserva de stock del carrito es inconsistente.');
+            }
+
+            $this->inventory->reserve($selection, (int) $cartItem->cantidad);
+            $this->recordIncrease($cartItem, $selection, (int) $cartItem->cantidad);
+        });
+    }
+
     public function syncPurchaseExpiration(Purchase $purchase): void
     {
         StockReservation::query()