Make GatewayCharge output as IRI strings on GatewayCheckout

src/Entity/GatewayCharge.php

@@ -13,6 +13,7 @@ use Symfony\Component\Validator\Constraints as Assert;
 /**
  * A GatewayCharge represents a monetary payment that can be done by an issuer at checkout with the Gateway.
  */
+#[API\Get()]
 #[ORM\Entity(repositoryClass: GatewayChargeRepository::class)]
 class GatewayCharge
 {

src/Entity/GatewayCheckout.php

@@ -60,6 +60,7 @@ class GatewayCheckout
      *
      * @var Collection<int, GatewayCharge>
      */
+    #[API\ApiProperty(readableLink: true)]
     #[Assert\NotBlank()]
     #[Assert\Count(min: 1)]
     #[ORM\OneToMany(mappedBy: 'checkout', targetEntity: GatewayCharge::class, cascade: ['persist'])]