feat(swap): EQD-6953 平仓期末结算收益率字段载体+结算确认书Excel导出——[NotMapped]ExitYtm随UnwindData进swap_event.EventData(零表结构变更)；生成器从浮动腿回读导出固定4位不去零(0.0000)；模板nodma_01.xlsx新增S列；命名遵《互换价格字段命名规范决策文档》平仓=Exit(非End/Close/Final)

Plugins/YLErp.Plugins.GuoLian/DocumentGenerator/TradeSettleBillGenerator.cs

@@ -67,6 +67,9 @@ namespace YLErp.Plugins.GuoLian.DocumentGenerator
                 decimal interestRate = unwindFlowEvents.Where(x => ConsTrade.InterestModels.Contains(x.InterestMode)).Sum(s => s.InterestRate);
                 row.InterestRate = interestRate.ToString("0.00%");
                 var PosiNotionalValue = flowEventGroup.Quantity * flowEventGroup.ContractSize * posi.PosiGrossPrice;
+                // EQD-6953 期末标的结算收益率：平仓簿记时随 UnwindData 存进 swap_event.EventData，
+                // 此处从浮动腿(PositionType>0)回读。存储态=展示态百分数(6.3721)，导出固定 4 位不去零。
+                decimal? exitYtm = null;
                 if (flowEventGroup.EventId.HasValue)
                 {
                     var swapEvent = Context.GetEvent(flowEventGroup.EventId.Value);
@@ -74,8 +77,12 @@ namespace YLErp.Plugins.GuoLian.DocumentGenerator
                     {
                         swapEvent.unwindData = JsonHelper.Deserialize<UnwindData>(swapEvent.EventData);
                         PosiNotionalValue = swapEvent.unwindData.CloseNotionalValue;
+                        exitYtm = swapEvent.unwindData.FlowEvents?
+                            .FirstOrDefault(f => f.PositionType > 0)?
+                            .ExitYtm;
                     }
                 }
+                row.ExitYtm = exitYtm?.ToString("0.0000") ?? string.Empty;
 
                 row.Quantity = flowEventGroup.Quantity.ToString("0.00");
                 row.PosiNotionalValue = PosiNotionalValue.ToString("0.00");