Merge branch '20260720_feature_fjy_ecpm_cost' of algorithm/ad-engine into master

ad-engine-service/src/main/java/com/tzld/piaoquan/ad/engine/service/score/impl/RankServiceImpl.java

@@ -108,6 +108,7 @@ public class RankServiceImpl implements RankService {
     public RankStrategy getRankStrategy(ScoreParam scoreParam) {
         // 尾号实验 883
         if (AbUtil.isInTailExp(scoreParam.getTailExpCodeSet(), "883")) {
+            scoreParam.setExpCode("883");
             return ServiceBeanFactory.getBean(RankStrategyBy883.class);
         }
         // 尾号实验 875(index 5)命中 → 走 872 排序策略；与 AB 的 expCode 完全隔离