build(deps-dev): bump vitest from 2.1.9 to 4.1.4 in the vitest group

Bumps the vitest group with 1 update: [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest).


Updates `vitest` from 2.1.9 to 4.1.4
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.1.4/packages/vitest)

---
updated-dependencies:
- dependency-name: vitest
  dependency-version: 4.1.4
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: vitest
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

packages/ai/package.json

@@ -16,6 +16,6 @@
   "devDependencies": {
     "@types/node": "^22.10.0",
     "typescript": "^5.7.2",
-    "vitest": "^2.1.8"
+    "vitest": "^4.1.4"
   }
 }

packages/core/package.json

@@ -16,6 +16,6 @@
   "devDependencies": {
     "@types/node": "^22.10.0",
     "typescript": "^5.7.2",
-    "vitest": "^2.1.8"
+    "vitest": "^4.1.4"
   }
 }

packages/sdk/package.json

@@ -64,6 +64,6 @@
   "devDependencies": {
     "@types/node": "^22.10.0",
     "typescript": "^5.7.2",
-    "vitest": "^2.1.8"
+    "vitest": "^4.1.4"
   }
 }