调整 Grok 媒体超时与重试语义

backend/internal/service/grok_media.go

@@ -658,7 +658,6 @@ func (s *OpenAIGatewayService) ForwardGrokMedia(
 	}
 	upstreamCtx, releaseUpstreamCtx := detachUpstreamContext(ctx)
 	defer releaseUpstreamCtx()
-	upstreamCtx = WithHTTPUpstreamProfile(upstreamCtx, HTTPUpstreamProfileGrok)
 	upstreamReq, err := http.NewRequestWithContext(upstreamCtx, endpoint.httpMethod(), targetURL, bodyReader)
 	if err != nil {
 		return nil, err
@@ -1295,6 +1294,7 @@ func (s *OpenAIGatewayService) handleGrokMediaErrorResponse(
 			ResponseBody:             body,
 			ResponseHeaders:          resp.Header.Clone(),
 			RetryableOnSameAccount:   retryable,
+			RequestScopedTransient:   retryable && resp.StatusCode == http.StatusTooManyRequests,
 			SameAccountRetryDelay:    retryDelay,
 			SameAccountRetryDeadline: retryDeadline,
 		}