fix: Fixed getting archived threads

[CMDisme]

Used get_active_threads as a template to properly implement threads_get_public_archived and threads_get_private_archived

Code change checklist

• I have ensured that all methods and functions are fully documented using doxygen style comments.
• My code follows the coding style guide.
• I tested that my change works before raising the PR.
• I have ensured that I did not break any existing API calls.
• I have not built my pull request using AI, a static analysis tool or similar without any human oversight.

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[CLAassistant]

All committers have signed the CLA.

[Mishura4]

Looks good, thanks for contributing! Just a minor thing and then good to go for me

[CMDisme]

This is used.

[Mishura4]

👍TODO: do the thing. Later, at some point