fix 重算离职人员

Src/Dlhis.Canteen/Order/Services/Implements/BalanceService.cs

@@ -555,7 +555,9 @@ public class BalanceService : IBalanceService
     {
         await CommonHelper.RetryAsync(async () =>
         {
-            var gainfo = await _dbContext.Queryable<GainfoEntity>().Where(x => x.Code == userCode).SingleAsync();
+            var gainfo = await _dbContext.Queryable<GainfoEntity>().Where(x => x.Code == userCode).SingleAsync() 
+                         ?? await _dbContext.Queryable<GainfoLeaveEntity>().Where(x => x.Code == userCode).SingleAsync();
+
             gainfo.ThrowIfNull("档案不存在");
 
             var gainfoMeal = await _dbContext.Queryable<GainfoMealEntity>().Where(x => x.UserCode == gainfo.Code).FirstAsync();