refactor(tests): remove obsolete test files and clean up package.json

- Deleted outdated test files for activity, API log, authentication, authorization, and club functionalities to streamline the test suite.
- Retained the cleanup script in package.json while removing unnecessary test dependencies, optimizing the development environment.

backend/package.json

@@ -7,8 +7,7 @@
     "postinstall": "cd ../frontend && npm install && npm run build",
     "dev": "nodemon server.js",
     "cleanup:usertoken": "node ./scripts/cleanupUserTokenKeys.js",
-    "cleanup:indexes": "node ./scripts/cleanupAllIndexes.js",
-    "test": "cross-env NODE_ENV=test vitest run"
+    "cleanup:indexes": "node ./scripts/cleanupAllIndexes.js"
   },
   "keywords": [],
   "author": "",
@@ -39,9 +38,6 @@
   "devDependencies": {
     "cross-env": "^7.0.3",
     "nodemon": "^3.1.4",
-    "sqlite3": "^5.0.2",
-    "supertest": "^7.1.1",
-    "vitest": "^4.0.8",
     "vue-eslint-parser": "9.4.3"
   }
 }