add router_late role

src/protos/meshtastic/config.proto

@@ -95,6 +95,15 @@ message Config {
        *    Uses position module configuration to determine TAK PLI broadcast interval.
        */
       TAK_TRACKER = 10;
+
+      /*
+       * Description: Will always rebroadcast packets, but will do so after all other modes.
+       * Technical Details: Used for router nodes that are intended to provide additional coverage
+       *    in areas not already covered by other routers, or to bridge around problematic terrain,
+       *    but should not be given priority over other routers in order to avoid unnecessaraily
+       *    consuming hops.
+       */
+      ROUTER_LATE = 11;
     }
 
     /*