refactor: Avoid reading unwanted bytes

Limit the reader to the max bytes, plus one to indicate that there's
more to truncate.

Author: Peeja

transport/http/channel.go

@@ -78,15 +78,15 @@ func (c *Channel) Request(ctx context.Context, req transport.HTTPRequest) (trans
 		return nil, fmt.Errorf("doing HTTP request: %w", err)
 	}
 	if !slices.Contains(c.statuses, res.StatusCode) {
-		b, readErr := io.ReadAll(res.Body)
+		const maxBodyLen = 4096
+		b, readErr := io.ReadAll(io.LimitReader(res.Body, maxBodyLen+1))
 		res.Body.Close()
 
 		msg := fmt.Sprintf("HTTP Request failed. %s %s → %d", hr.Method, c.url.String(), res.StatusCode)
 		if readErr != nil {
 			msg += fmt.Sprintf(" (failed to read response body: %s)", readErr)
 		} else if len(b) > 0 {
 			body := string(b)
-			const maxBodyLen = 4096
 			if len(body) > maxBodyLen {
 				body = body[:maxBodyLen] + "... (truncated)"
 			}