chore(dev-deps): update vitest monorepo to v4

Author: renovate[bot]

package.json

@@ -102,7 +102,7 @@
     "@types/node": "18.19.130",
     "@typescript-eslint/eslint-plugin": "8.56.1",
     "@typescript-eslint/parser": "8.56.1",
-    "@vitest/coverage-v8": "3.2.4",
+    "@vitest/coverage-v8": "4.0.18",
     "@vitest/eslint-plugin": "1.6.9",
     "cspell": "9.7.0",
     "dedent": "1.7.1",
@@ -145,7 +145,7 @@
     "tsx": "4.21.0",
     "typescript": "5.9.3",
     "vite-tsconfig-paths": "6.1.1",
-    "vitest": "3.2.4",
+    "vitest": "4.0.18",
     "yaml-eslint-parser": "2.0.0"
   },
   "peerDependencies": {