[Fix] Move sleep so it occurs only when retrying

CHANGELOG.md

@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## Unreleased
+- Sleep before a retry rather than after each try.
 
 ## v6.0.0 - 2025-10-28
 - ⚠️ [Breaking] Remove `ApiVersion::LATEST` constant to prevent semver violations. The `apiVersion` parameter is now required in `Context::initialize()`. Developers must explicitly specify API versions. See the [migration guide](BREAKING_CHANGES_FOR_V6.md#removal-of-apiversionlatest-constant) for details.

src/Clients/Http.php

@@ -213,15 +213,16 @@ protected function request(
         $currentTries = 0;
         do {
             $currentTries++;
+            if ($currentTries > 1) {
+                usleep((int)($retryAfter * 1000000));
+            }
 
             $response = HttpResponse::fromResponse($client->sendRequest($request));
 
             if (in_array($response->getStatusCode(), self::RETRIABLE_STATUS_CODES)) {
                 $retryAfter = $response->hasHeader(HttpHeaders::RETRY_AFTER)
                     ? $response->getHeaderLine(HttpHeaders::RETRY_AFTER)
                     : Context::$RETRY_TIME_IN_SECONDS;
-
-                usleep((int)($retryAfter * 1000000));
             } else {
                 break;
             }