add new endpoints

i18n/migrations/20260302163122_create_tables.sql

@@ -102,7 +102,7 @@ CREATE TABLE IF NOT EXISTS b2b_carts_products (
   cart_id BIGINT UNSIGNED NOT NULL,
   product_id INT UNSIGNED NOT NULL,
   product_attribute_id BIGINT NULL,
-  amount INT NOT NULL,
+  amount INT UNSIGNED NOT NULL,
   CONSTRAINT fk_carts_products_customer_carts FOREIGN KEY (cart_id) REFERENCES b2b_customer_carts (cart_id) ON DELETE CASCADE ON UPDATE CASCADE,
   CONSTRAINT fk_carts_products_product FOREIGN KEY (product_id) REFERENCES ps_product (id_product) ON DELETE CASCADE ON UPDATE CASCADE
 ) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4;