routes/index.ts: Correctly register wsErrorHandler

express requires all 4 arguments to be declared for a error handler.
It's very unfortunate that our types do not handle this.

src/node/routes/index.ts

@@ -165,7 +165,7 @@ export const register = async (
 
   app.use(errorHandler)
 
-  const wsErrorHandler: express.ErrorRequestHandler = async (err, req) => {
+  const wsErrorHandler: express.ErrorRequestHandler = async (err, req, res, next) => {
     logger.error(`${err.message} ${err.stack}`)
     ;(req as WebsocketRequest).ws.end()
   }