fix: change externalDeps to singelton and update module route tostring

Co-authored-by: MasterMarcoHD <MasterMarcoHD@users.noreply.github.com>

Author: mcquenji

lib/src/domain/models/route.dart

@@ -73,6 +73,6 @@ class ModuleRoute<T, Config extends Object> extends Route<T, Config> {
 
   @override
   String toString() {
-    return 'ModuleRoute(path: $path, module: $module, middleware: $middleware)';
+    return 'ModuleRoute(path: $path, module: $module, middleware: $middleware, root: $root)';
   }
 }

lib/src/module.dart

@@ -78,7 +78,7 @@ abstract class Module<RouteType, Config extends Object>
     _di.pushNewScope(scopeName: runtimeType.toString(), dispose: dispose);
 
     bindExternalDeps(<T extends Object>(builder) {
-      _di.registerFactory<T>(() => builder(_di.get<Config>(), _di.get));
+      _di.registerSingleton<T>(builder(_di.get<Config>(), _di.get));
     });
 
     bindServices(<T extends Service>(Builder<Service, Config> builder) {