refactor(wms): 优化卷材变更日志记录逻辑

- 重构加工变换日志记录，支持合并、分卷等不同场景
- 修改快照对比逻辑，合并新旧键值以避免遗漏空值字段
- 调整仓库层级排序算法，移除四级库位的序号修正
- 注释掉卷材合同关系中的日志记录代码
- 在撤回导出时清空操作人员信息

klp-crm/src/main/java/com/klp/crm/service/impl/CrmOrderServiceImpl.java

@@ -276,7 +276,7 @@ public class CrmOrderServiceImpl implements ICrmOrderService {
         // 1. 置顶优先 (is_top=1 排在前面)
         // 2. 合同号倒序（KLPY+年月日+序号，降序最新在前）
         qw.orderByDesc("co.is_top")
-          .orderByDesc("co.contract_code");
+            .orderByDesc("co.contract_code");
         return qw;
     }
 
@@ -365,10 +365,11 @@ public class CrmOrderServiceImpl implements ICrmOrderService {
 
                         // 计算变更字段差异
                         Map<String, Map<String, Object>> diff = new LinkedHashMap<>();
-                        for (Map.Entry<String, Object> fieldEntry : newSnapshot.entrySet()) {
-                            String field = fieldEntry.getKey();
+                        Set<String> allKeys = new LinkedHashSet<>(oldSnapshot.keySet());
+                        allKeys.addAll(newSnapshot.keySet());
+                        for (String field : allKeys) {
                             Object oldVal = oldSnapshot.get(field);
-                            Object newVal = fieldEntry.getValue();
+                            Object newVal = newSnapshot.get(field);
                             if (!Objects.equals(oldVal, newVal)) {
                                 Map<String, Object> change = new LinkedHashMap<>();
                                 change.put("old", oldVal);