Chore: Upgrade Vitest to v4 (#7797)

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## Summary

https://vitest.dev/guide/migration.html#vitest-4

## Changes

- **What**: Update Vitest and some associated dependencies
- **What**: Fix issue with our existing mocks and mock types

## Review Focus

Double check the test updates. I tried to keep the changes minimal.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7797-Chore-Upgrade-Vitest-to-v4-2d96d73d3650810cbe3ac42d7bd6585a)
by [Unito](https://www.unito.io)

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Co-authored-by: GitHub Action <action@github.com>

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This commit is contained in:

Alexander Brown

2025-12-29 19:24:35 -08:00

committed by GitHub

parent 91ed58acc9

commit 3ae2b52649

22 changed files with 615 additions and 576 deletions

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