chore(deps): update vitest monorepo to v4

Author: renovate[bot]

package.json

@@ -33,7 +33,7 @@
         "@types/node": "^24.9.2",
         "@typescript-eslint/eslint-plugin": "^8.46.2",
         "@typescript-eslint/parser": "^8.46.2",
-        "@vitest/coverage-v8": "^3.2.4",
+        "@vitest/coverage-v8": "^4.0.0",
         "eslint": "^9.39.0",
         "eslint-config-prettier": "^10.1.8",
         "husky": "^9.1.7",
@@ -44,7 +44,7 @@
         "tsup": "8.5.0",
         "typescript": "^5.9.3",
         "typescript-eslint": "^8.46.2",
-        "vitest": "^3.2.4"
+        "vitest": "^4.0.0"
     },
     "repository": {
         "type": "git",

packages/cloudflare-worker/package.json

@@ -15,7 +15,7 @@
         "@cloudflare/workers-types": "^4.20251014.0",
         "esbuild": "^0.25.11",
         "typescript": "^5.9.3",
-        "vitest": "3.2.4",
+        "vitest": "4.1.0",
         "wrangler": "^4.45.3"
     },
     "dependencies": {