fix(swap): 修复部分平仓计息计算中的尾差处理问题

- 修正了部分平仓后待实现利息收入的预期值从 0.006383561644 到 -0.010438356164
- 修正了预期待实现利息值从 0.820569301369 到 0.410474008219
- 在 SwapDealService 中添加了已完成平仓事件的查询逻辑，排除已平仓头寸的本金计算
- 重构了 SwapEodPositionService 中的待结算利息计算逻辑，区分自动互换和平仓场景
- 在测试类中添加了已完成流程事件的查找方法和相关测试数据
- 更新了测试用例以验证平仓事件对利息计算的影响

YLErpDAL/Modules/SwapModule/SwapDealService.cs

@@ -700,6 +700,9 @@ namespace YLErp.Modules.SwapModule
                     || x.InterestMode == (int)InterestModeEnum.追加预付金)
                 .GroupBy(x => x.PositionId)
                 .ToDictionary(x => x.Key, x => x.Sum(v => v.InterestPrincipal));
+            var priorClosePositionIds = new HashSet<long>((completedFlowEvents ?? Enumerable.Empty<swap_flow_event>())
+                .Where(x => x.EventType == (int)SwapEventTypeEnum.平仓 && x.EventDate <= settleDate)
+                .Select(x => x.PositionId));
 
             return origPositions.Where(x => x.PosiDirection == 0).Select(p =>
             {
@@ -709,6 +712,10 @@ namespace YLErp.Modules.SwapModule
                     var realLeg = realPositions.FirstOrDefault(r => r.PositionId == p.id);
                     if (realLeg != null)
                     {
+                        if (!priorClosePositionIds.Contains(p.id))
+                        {
+                            return p;
+                        }
                         var futurePrincipal = hasNotionalFlows
                             ? p.InterestPrincipalFix * futureCloseNotional / originalNotional
                             : futureClosePrincipal.TryGetValue(p.id, out var flowPrincipal) ? flowPrincipal : 0m;

YLErpDAL/Modules/SwapModule/SwapEodPositionService.cs

@@ -1412,12 +1412,9 @@ namespace YLErp.Modules.SwapModule
             }
             else
             {
-                var useAccrualBalance = !autoSwap
-                    && (position.InterestMode == (int)InterestModeEnum.初始预付金
-                        || position.InterestMode == (int)InterestModeEnum.追加预付金);
-                var pendingInterestBeforeSettlement = useAccrualBalance
-                    ? lastInterestIncomeSum + newEodPayPosition.TdInterestIncome
-                    : interestAmountBeforeSettlement;
+                var pendingInterestBeforeSettlement = autoSwap
+                    ? interestAmountBeforeSettlement
+                    : lastInterestIncomeSum + newEodPayPosition.TdInterestIncome;
                 newEodPayPosition.InterestIncomeSum = RoundEodInterest(
                     pendingInterestBeforeSettlement - newEodPayPosition.TdCloseInterest);
                 newEodPayPosition.InterestFeeSum = eodPayPosition.InterestFeeSum + newEodPayPosition.TdInterestFee - newEodPayPosition.TdCloseInterestFee;