Unable to view or list spool files for job with "SYS FAIL" RC

[t1m0thyj]

Describe the bug

FTP plugin commands hang indefinitely for a job with an RC that is a string value like "SYS FAIL".
This is a valid return code according the docs here: https://www.ibm.com/docs/en/zos/2.3.0?topic=output-view-job-page

Expected and actual results

The zowe zos-ftp list spool-files-by-jobid and zowe zos-ftp view spool-file-by-id commands hang indefinitely.
I would expect them to return data successfully for a job with "SYS FAIL" RC.

Describe your environment

vNext (v3) version of FTP plugin
Node 20.12.2
npm 10.5.0
macOS 14.4.1

Additional context

The same issue is present in the Zowe Explorer FTP Extension.

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