Production readiness, SEO enhancements, and Engine V2 upgrades

package-lock.json

@@ -15,6 +15,7 @@
         "cors": "^2.8.6",
         "dotenv": "^17.4.2",
         "express": "^5.2.1",
+        "helmet": "^8.2.0",
         "jsonwebtoken": "^9.0.3",
         "jspdf": "^4.2.1",
         "jspdf-autotable": "^5.0.8",
@@ -2440,6 +2441,18 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/helmet": {
+      "version": "8.2.0",
+      "resolved": "https://registry.npmjs.org/helmet/-/helmet-8.2.0.tgz",
+      "integrity": "sha512-DRgTIUgnWcJ62KyarxxziuqYxKGnR6Rgg19BlbucN/dpmJbl1XOit6qvoOX0ZT+HhWe5OUVhU/a1zpGyc1xA0Q==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=18.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/EvanHahn"
+      }
+    },
     "node_modules/hls.js": {
       "version": "1.6.16",
       "resolved": "https://registry.npmjs.org/hls.js/-/hls.js-1.6.16.tgz",