BREAKING_CHANGE(routing): refactor route configuration to support multiple targets

test/test.port-mapping.ts

@@ -214,12 +214,12 @@ tap.test('should handle errors in port mapping functions', async () => {
     },
     action: {
       type: 'forward',
-      target: {
+      targets: [{
         host: 'localhost',
         port: () => {
           throw new Error('Test error in port mapping function');
         }
-      }
+      }]
     },
     name: 'Error Route'
   };