Ability to extract requests with failed status codes

It would be great if we could get all request, regardless of the status code.
one way to do this would be to add the status code as the file suffix i.e. `example.401`

Start at the CLI entry point that extracts requests from HAR files and trace where response status codes are filtered or mapped to output filenames. Confirm that requests with failed status codes are included and that the resulting files use the status code suffix described in the issue.

Written by the indexing model from the issue text.