[httpclent][har] ensure gzipped responses are encoded in base64 to be…

… readable in json

fusion-httpclient-parent/fusion-httpclient/src/main/java/io/yupiik/fusion/httpclient/core/listener/impl/BaseHARDumperListener.java

@@ -188,7 +188,8 @@ private Body extractBody(final HttpResponse<?> response, final byte[] body) {
                     .map(contentType -> new Body(
                             body.length,
                             List.of("application/octet-stream", "multipart/form-data").contains(contentType) ||
-                                    contentType.startsWith("application/vnd.openxmlformats-officedocument") ?
+                                    contentType.startsWith("application/vnd.openxmlformats-officedocument") ||
+                                    response.headers().firstValue("content-encoding").isPresent() ?
                                     new Har.Content(body.length, 0, contentType, Base64.getEncoder().encodeToString(body), "base64", "") :
                                     new Har.Content(body.length, 0, contentType, new String(body, StandardCharsets.UTF_8), null, "")))
                     .orElseGet(() -> new Body(body.length, null));