fix(deps): bump vitest to 4 in twenty-meeting-bot (drops vulnerable esbuild) (#22025)

## Summary

Bumps **vitest** `^3.1.1 → ^4.1.9` in `twenty-meeting-bot`, which lets
**vite** resolve to **8.0.16** — and vite 8 dropped esbuild entirely
(moved to rolldown). That **removes the vulnerable transitive
`esbuild@0.27.7` outright**, resolving [Dependabot alert
#1470](https://github.com/twentyhq/twenty/security/dependabot/1470) —
GHSA-g7r4-m6w7-qqqr (esbuild dev-server arbitrary file read on Windows,
`>=0.27.3 <0.28.1`).

## Why a parent-bump, not a resolution

- The vulnerable esbuild came from `vite@7.3.5` (`esbuild ^0.27.0`, a
`0.x` caret capped at `<0.28` — so `yarn up` couldn't reach the fix).
- vite is gated by vitest's vite range: vitest **3.x** allows only
`^5||^6||^7` (caps vite at 7 → esbuild 0.27); vitest **4.x** allows
`^8`, and **vite 8 has no esbuild dependency at all**.
- So bumping vitest lets vite resolve to 8, which **eliminates the
vulnerable dependency entirely** — no `resolutions` entry to force or
maintain. (Matches the repo's stated preference: fix by upgrading the
parent, not by resolution.)

## Verification

- `yarn install` — vite resolves to `8.0.16`; all `@esbuild/*@0.27.7`
platform packages pruned; the only esbuild left is `0.28.1`
(already-fixed, from another consumer).
- `yarn typecheck` — passes.
- `yarn test:unit` — **202 tests / 30 files pass** under vitest 4.1.9,
no peer warnings; `vite-tsconfig-paths` still compatible with vite 8.
- `yarn install --immutable` — passes.
- (Integration `yarn test` is gated on a live Twenty server, so not run
here — that requirement is independent of this bump.)
- Separate yarn project — changes are confined to
`twenty-meeting-bot/{package.json,yarn.lock}`; no root impact.

## Note

vite 8 supports tsconfig-paths resolution natively
(`resolve.tsconfigPaths: true`), so `vite-tsconfig-paths` could be
dropped in a follow-up — left as-is to keep this change minimal.

packages/twenty-apps/internal/twenty-meeting-bot/package.json

@@ -35,6 +35,6 @@
     "twenty-sdk": "2.15.0",
     "typescript": "^5.9.3",
     "vite-tsconfig-paths": "^4.2.1",
-    "vitest": "^3.1.1"
+    "vitest": "^4.1.9"
   }
 }