fix: only add log middleware to not found handler when enabled (#3969)

rest/engine.go

@@ -217,9 +217,12 @@ func (ng *engine) notFoundHandler(next http.Handler) http.Handler {
 			handler.TraceHandler(ng.conf.Name,
 				"",
 				handler.WithTraceIgnorePaths(ng.conf.TraceIgnorePaths)),
-			ng.getLogHandler(),
 		)
 
+		if ng.conf.Middlewares.Log {
+			chn = chn.Append(ng.getLogHandler())
+		}
+
 		var h http.Handler
 		if next != nil {
 			h = chn.Then(next)