feat: use zstd instead of gz by default, fix the backup script

[brokenpip3]

Changes

• Fix backup script: in case of warnings (like files changes while reading) do not fail the backup
• Use zstd by default should be faster than gz especially in situations where you have a lot of jobs

Submitter Checklist

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Reviewer Notes

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Release Notes

* Fix backup script: in case of warnings (like files changes while reading) do not fail the backup
* Use zstd by default should be faster than gz especially in situations where you have a lot of jobs