Invalidate order cache on updates and adjust delete logic for order_items_o

- Added `objectChanged()` to notify the order object when items are updated or deleted.
- Refactored `delete()` method to ensure the order is informed before executing the database query.

services/nginx/app/objects/order_items_o.php

@@ -197,6 +197,8 @@ class order_items_o extends db
             if ($notes) {
                 $this->notes->set($notes);
             }
+            // Invalidate the order cache
+            $order->objectChanged();
 
         } catch (Exception $e) {
             $response->error($e->getMessage());
@@ -212,10 +214,11 @@ class order_items_o extends db
         // TODO: Implement delete() method instead
         global $db;
         $this->id = $id;
-        $sql = "DELETE FROM $this->table WHERE id = $this->id or related_item_id = $this->id";
-        $db->query($sql);
+        $this->select($this->id);
         // Inform the order object that an item has been removed
         $this->getOrder()->objectChanged();
+        $sql = "DELETE FROM $this->table WHERE id = $this->id or related_item_id = $this->id";
+        $db->query($sql);
     }
 
     public function getItemAsArray(): array