Complete Vitest Setup and Configuration for Backend

[Pinkish-Warrior]

• Identified Uncommitted Changes: You had completed work related to Vitest setup and configuration in the KeyCV-Infrastructure repository.
• Branching & Committing: I helped you create a new branch (feat/complete-vitest-setup) and committed your changes with a descriptive message (feat: complete vitest setup and configuration).
• Sync with Main: We updated your new branch with the latest changes from the main branch by performing a git pull on main, switching back to your feature branch, and then performing a git rebase main. This was followed by a git push --force-with-lease to update the remote.
• Pull Request: Your updated branch is now ready for a pull request on GitHub, and I provided both the direct link and a comprehensive description for it.

[Pinkish-Warrior]

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