refactor(stock): make expired reservations terminal

app/Domains/Cart/Models/Cart.php

@@ -119,6 +119,7 @@ class Cart extends Model
 
         return DB::transaction(function () use ($catalogItemId, $variantId, $quantity): CartItem {
             $this->invalidateCurrentCheckout();
+            app(StockReservationService::class)->assertCartReservationUsable($this);
             $selectedItem = $this->resolveScopedItem($catalogItemId, $variantId, true);
             $cartQuantity = (int) $this->items()
                 ->where('catalog_item_id', $catalogItemId)
@@ -183,6 +184,7 @@ class Cart extends Model
             $excludedPurchaseId,
         ): CartItem {
             $this->invalidateCurrentCheckout();
+            app(StockReservationService::class)->assertCartReservationUsable($this);
 
             /** @var CartItem $item */
             $item = $this->items()
@@ -284,6 +286,7 @@ class Cart extends Model
     {
         DB::transaction(function () use ($cartItemId): void {
             $this->invalidateCurrentCheckout();
+            app(StockReservationService::class)->assertCartReservationUsable($this);
 
             /** @var CartItem $item */
             $item = $this->items()
@@ -334,9 +337,14 @@ class Cart extends Model
             Purchase::STATUS_CREATED,
             Purchase::STATUS_PENDING_PAYMENT,
         ], true)) {
+            app(StockReservationService::class)->returnToCart($currentPurchase, $cart);
             $currentPurchase->update([
                 'status' => Purchase::STATUS_SUPERSEDED,
             ]);
+
+            $this->current_purchase_id = null;
+
+            return;
         }
 
         app(StockReservationService::class)->releaseForPurchase(