fix(DMD-987): check isSeekable() before calling rewind()

- Add isSeekable() check before rewinding response body stream
- Prevents potential errors with non-seekable streams

Co-Authored-By: Martin Zajic <ja@mzajic.cz>

Author: devin-ai-integration[bot]

src/Keboola/StorageApi/HandlerStack.php

@@ -82,7 +82,9 @@ private static function createDefaultDecider(int $maxRetries, bool $retryOnMaint
     private static function isVersionConflictResponse(ResponseInterface $response): bool
     {
         $body = (string) $response->getBody();
-        $response->getBody()->rewind();
+        if ($response->getBody()->isSeekable()) {
+            $response->getBody()->rewind();
+        }
 
         $data = json_decode($body, true);
         if (!is_array($data)) {