[Start] Include request URL in logs for notFoundError warning

[charlesobrien]

Adding this here for tracking per ask from @schiller-manuel from Discord.

While developing locally I was getting multiple "notFoundError was encountered on the route with ID "root" ..." warnings in my terminal logs. I had no idea what was triggering the warning, however -- was it a missing favicon.ico the browser was requesting? Something else? There were also no 404s showing in Chrome Dev Tools network pane. Turns out, Chrome Dev Tools silently asks for a "devtools.json" file.

In the future, diagnosing notFoundErrors would be improved if the request URL was also included in the logs/warning (e.g., in this case clearly showing that it was a request for devtools.json that was triggering the notFoundError).