how should the filename be saved as?

 @GetMapping("{trace-id}")
    @ResponseStatus(HttpStatus.OK)
//    @ApiResponses(value = {@ApiResponse(responseCode = "200", description = "Successful", content = @Content(mediaType = "text/csv"))})
    @ApiResponses(value = {
            @ApiResponse(responseCode = "200", description = "Successful", content = @Content(mediaType = "application/octet-stream"))
    })
    public void downloadCSVFindByUUID(@TraceIdNonExistent @PathVariable("trace-id") final String traceId, final HttpServletResponse servletResponse) {
        csvReadWriteService.writeCsvFileToResponse(traceId, servletResponse);
    }

// ----------------------------------
    private void writeCsvResponse(final String client, final String uuid, final List<CsvEntryResp> csvRespList, final OutputStream out) {
        final String[] memberFieldsToBindTo = FieldExtractorUtil.getFieldNames(CsvEntryResp.class);
        final ColumnPositionMappingStrategy<CsvEntryResp> strategy = new ColumnPositionMappingStrategy<>();
        strategy.setType(CsvEntryResp.class);
        strategy.setColumnMapping(memberFieldsToBindTo);

        log.info("PrintWriter ClientId: {}. List-CsvEntryResp-Count: {}", client, csvRespList.size());

        try (final GZIPOutputStream gzip = new GZIPOutputStream(out);
             final OutputStreamWriter osw = new OutputStreamWriter(gzip, StandardCharsets.UTF_8);
             final PrintWriter writer = new PrintWriter(osw)) {

            final List<String> list = new ArrayList<>();
            Collections.addAll(list, memberFieldsToBindTo);
            final var header = String.format("%s%s", list.toString()
                    .replaceAll("\[", "")
                    .replaceAll("\]", "")
                    .replaceAll(" ", ""), "n");

            final StatefulBeanToCsv<CsvEntryResp> beanToCsv = new StatefulBeanToCsvBuilder<CsvEntryResp>(writer)
                    .withMappingStrategy(strategy)
                    .withQuotechar(NO_QUOTE_CHARACTER)
                    .build();

            writer.write(header);
            beanToCsv.write(csvRespList.parallelStream());
            writer.flush();

            log.info("Completed writing CSV Response File-Length: {} with clientId: {}", gzip.toString().getBytes(StandardCharsets.UTF_8).length, client);
        } catch (Exception e) {
            log.error("CSV writer error. {}", e.getMessage(), e);
            throw new CsvFileProcessingException(uuid, null, String.format("CSV writer error. %s", e.getMessage()));
        }
    }

I tried renaming the gzip filename. it won’t save with the correct name.