fix: address code review findings

internal/yandex/client.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"io"
 	"math/rand"
 	"net/http"
 	"net/url"
@@ -197,10 +196,9 @@ func (c *Client) executeRequest(ctx context.Context, url string) (*Response, err
 	if err != nil {
 		return nil, fmt.Errorf("request failed: %w", err)
 	}
+	defer resp.Body.Close()
 
 	if resp.StatusCode >= 400 {
-		io.ReadAll(resp.Body) // Drain body to allow connection reuse
-		resp.Body.Close()
 		return nil, newAPIError(resp.StatusCode, resp.Status)
 	}