fix(test-app-node-express): upgrade express to v5 to fix path-to-regexp >=8.4.0 override

Express 4.x internally calls `pathRegexp` from path-to-regexp, which was
removed in 8.4.0. The workspace override forces >=8.4.0 for security;
upgrading the test app to express 5 (which uses 8.4+ natively) resolves
the TypeError and makes all smoke tests pass.

Author: Polliog

pnpm-lock.yaml

@@ -8,7 +8,7 @@
   },
   "dependencies": {
     "@logtide/sdk-node": "workspace:*",
-    "express": "^4.21.0"
+    "express": "^5.0.0"
   },
   "devDependencies": {
     "@types/express": "^4.17.21",