feat:添加字段

recommend-feature-client/src/main/java/com/tzld/piaoquan/recommend/feature/domain/ad/base/AdRankItem.java

@@ -48,7 +48,9 @@ public class AdRankItem implements Comparable<AdRankItem> {
     private String adVerId;
 
     // 特征
-    private Map<String, Object> feature = new HashMap<>();
+    private Map<String, Object> ext = new HashMap<>();
+
+    private Map<String, String> featureMap = new HashMap<>();
 
     public AdRankItem() {
         // TODO