chore: Update jest configuration for role middleware tests

backend/package-lock.json

@@ -12,6 +12,7 @@
         "bcryptjs": "^3.0.3",
         "dotenv": "^17.3.1",
         "express": "^5.2.1",
+        "helmet": "^8.1.0",
         "jsonwebtoken": "^9.0.3",
         "mysql2": "^3.18.2",
         "path-to-regexp": "^8.3.0",
@@ -4835,6 +4836,15 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/helmet": {
+      "version": "8.1.0",
+      "resolved": "https://registry.npmjs.org/helmet/-/helmet-8.1.0.tgz",
+      "integrity": "sha512-jOiHyAZsmnr8LqoPGmCjYAaiuWwjAPLgY8ZX2XrmHawt99/u1y6RgrZMTeoPfpUbV96HOalYgz1qzkRbw54Pmg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
     "node_modules/html-escaper": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/html-escaper/-/html-escaper-2.0.2.tgz",