chore(deps): bump express and @types/express

Bumps [express](https://github.com/expressjs/express) and [@types/express](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/express). These dependencies needed to be updated together.

Updates `express` from 4.21.1 to 5.1.0
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.21.1...v5.1.0)

Updates `@types/express` from 4.17.21 to 5.0.5
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/express)

---
updated-dependencies:
- dependency-name: express
  dependency-version: 5.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: "@types/express"
  dependency-version: 5.0.5
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

agent/package.json

@@ -14,13 +14,13 @@
     "ai": "^4.1.51",
     "cors": "^2.8.5",
     "dotenv": "^16.4.5",
-    "express": "^4.18.2",
+    "express": "^5.1.0",
     "oidc-provider": "^8.5.3",
     "zod": "3.24.1"
   },
   "devDependencies": {
     "@types/cors": "^2.8.17",
-    "@types/express": "^4.17.21",
+    "@types/express": "^5.0.5",
     "@types/node": "^20.11.7",
     "@types/oidc-provider": "^8.5.2",
     "tsx": "^4.7.0",