refactor(main.go): rename feature-port flag to port for consistency

The flag name is changed to be consistent with other parts of the
application. This improves readability and maintainability.

cmd/modware-annotation/main.go

@@ -89,7 +89,7 @@ func getServerFlags() []cli.Flag {
 func getFeatureServerFlags() []cli.Flag {
 	flg := []cli.Flag{
 		cli.StringFlag{
-			Name:  "feature-port",
+			Name:  "port",
 			Usage: "tcp port at which the feature server will be available",
 			Value: "9570",
 		},