⬆️ vitest v4 (#6060)

* vitest 4

* config changes

* remove unused v8 coverage dependency

* note

packages/sync-server/package.json

@@ -59,11 +59,10 @@
     "@types/express-actuator": "^1.8.3",
     "@types/node": "^22.18.11",
     "@types/supertest": "^6.0.3",
-    "@vitest/coverage-v8": "3.2.4",
     "http-proxy-middleware": "^3.0.5",
     "nodemon": "^3.1.10",
     "supertest": "^7.1.4",
     "typescript": "^5.9.3",
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.6"
   }
 }

packages/sync-server/vitest.config.ts

@@ -6,11 +6,6 @@ export default {
     coverage: {
       enabled: false,
     },
-    poolOptions: {
-      threads: {
-        maxThreads: 2,
-        minThreads: 1,
-      },
-    },
+    maxWorkers: 2,
   },
 };