feat: include origin server metadata in backup archive library

[dwong2708]

Resolves: #432

Support for specifying the origin server was already available when creating a package.toml file.
However, due to the urgency of completing the backup and restore functionality, it was not included at that time.
This option is now also available as a parameter at runtime.

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[ormsbee]

Just a minor request to leave the path handling as-is, instead of modifying it as part of this PR.