Add support for 429 Too Many Requests HTTP status code

Author: const-cloudinary

src/Api/BaseApiClient.php

@@ -53,7 +53,8 @@ class BaseApiClient
             HttpStatusCode::FORBIDDEN             => NotAllowed::class,
             HttpStatusCode::NOT_FOUND             => NotFound::class,
             HttpStatusCode::CONFLICT              => AlreadyExists::class,
-            HttpStatusCode::ENHANCE_YOUR_CALM     => RateLimited::class, // RFC6585::TOO_MANY_REQUESTS
+            HttpStatusCode::ENHANCE_YOUR_CALM     => RateLimited::class,
+            HttpStatusCode::TOO_MANY_REQUESTS     => RateLimited::class,
             HttpStatusCode::INTERNAL_SERVER_ERROR => GeneralError::class,
         ];
 

src/Api/Utils/HttpStatusCode.php

@@ -90,6 +90,16 @@ class HttpStatusCode
      */
     public const ENHANCE_YOUR_CALM = 420;
 
+    /**
+     * The 429 (Too Many Requests) status code indicates the user has sent too
+     * many requests in a given amount of time ("rate limiting").
+     *
+     * @link https://datatracker.ietf.org/doc/html/rfc6585#section-4
+     *
+     * @var int
+     */
+    public const TOO_MANY_REQUESTS = 429;
+
     /**
      * The 500 (Internal Server Error) status code indicates that the server
      * encountered an unexpected condition that prevented it from fulfilling the