test(swap): 为债券TRS期间结算自动互换10场景补单测 + SaveAutoSwapDeal接缝可测化

- 新增 BondTrsAutoSwapScenarioTest：覆盖测试场景/测试场景-0702复测两页
  10个自动互换场景（含付息日历登记日2/28→支付日3/2、资金发生日3/3/3/4）、
  部分平仓后按登记日持仓数量计算(剩余60%为54240)、同日多腿合并、
  分红支付日偏移、无结算观察日不得凭空产生互换等，共11条断言全绿。
- SaveAutoSwapDeal 改为走 AddClientCash/AddSwapEvent/PersistFlowEvent 接缝
  (默认实现与重构前行为一致，零行为变更)；UpdateInitalPostion 由 private
  改 protected virtual；GetPreDealDate 改 virtual，便于无DB单测。

YLErpDAL/Modules/SwapModule/SwapEodPositionService.cs

@@ -127,6 +127,12 @@ namespace YLErp.Modules.SwapModule
             }
         }
 
+        /// <summary>持久化互换流水事件（生产: DbContext.swap_flow_event.Add；测试: 收集到列表）</summary>
+        protected virtual void PersistFlowEvent(swap_flow_event flowEvent)
+        {
+            DbContext.swap_flow_event.Add(flowEvent);
+        }
+
         /// <summary>保存所有变更（生产: DbContext.SaveChanges；测试: 计数）</summary>
         protected virtual void SaveAllChanges()
         {
@@ -773,14 +779,14 @@ namespace YLErp.Modules.SwapModule
             // 利息腿：插入资金记录（使用系统操作_互换）
             if (unwindData.SwapCloseAmount != 0)
             {
-                clientCashId = AddClientCashInCashOut(td, Convert.ToDouble(-unwindData.SwapCloseAmount), ClientCashInCashOut.系统操作_互换, cashHappenDate);
+                clientCashId = AddClientCash(td, Convert.ToDouble(-unwindData.SwapCloseAmount), ClientCashInCashOut.系统操作_互换, cashHappenDate);
                 clientCashIds.Add(clientCashId);
             }
            
             // 预付金腿：单独插入一条资金记录（系统操作_预付金返息）
             if (unwindData.SwapMarginRebatePnl != 0)
             {
-                clientCashId = AddClientCashInCashOut(td, Convert.ToDouble(-unwindData.SwapMarginRebatePnl), ClientCashInCashOut.系统操作_预付金返息, unwindData.ValueDate);
+                clientCashId = AddClientCash(td, Convert.ToDouble(-unwindData.SwapMarginRebatePnl), ClientCashInCashOut.系统操作_预付金返息, unwindData.ValueDate);
                 clientCashIds.Add(clientCashId);
             }
             unwindData.SwapCloseAmount = unwindData.SwapRealizedPnL;//需要算上预付金利息 和 分红； 只是不算预付金返还
@@ -790,19 +796,19 @@ namespace YLErp.Modules.SwapModule
                 var dividendPayDate = (dividendEvents != null && dividendEvents.Count > 0)
                     ? dividendEvents.First().PayDate.Value
                     : unwindData.ValueDate;
-                clientCashId = AddClientCashInCashOut(td, Convert.ToDouble(-unwindData.SwapDividendPnl), ClientCashInCashOut.系统操作_互换, dividendPayDate);
+                clientCashId = AddClientCash(td, Convert.ToDouble(-unwindData.SwapDividendPnl), ClientCashInCashOut.系统操作_互换, dividendPayDate);
                 clientCashIds.Add(clientCashId);
             }
 
             unwindData.ClientCashIds = clientCashIds;
             string data = JsonConvert.SerializeObject(unwindData);
-            var swapEvent = new SwapEventService(this).AddSwapEventDate(unwindData.ValueDate, unwindData.SwapTradeId, (int)SwapEventTypeEnum.自动互换, data, clientCashId, true, "系统操作-自动互换");//将互换总额存入事件
+            var swapEvent = AddSwapEvent(unwindData.ValueDate, unwindData.SwapTradeId, (int)SwapEventTypeEnum.自动互换, data, clientCashId, true, "系统操作-自动互换");//将互换总额存入事件
             if (flowEvents!=null)
             {
                 flowEvents.ForEach(x =>
                 {
                     x.EventId = swapEvent.id;
-                    DbContext.swap_flow_event.Add(x);
+                    PersistFlowEvent(x);
                 });
                 UpdateInitalPostion(flowEvents, td.id);
             }
@@ -813,7 +819,7 @@ namespace YLErp.Modules.SwapModule
                 dividendEvents.ForEach(x =>
                 {
                     x.EventId = swapEvent.id;
-                    DbContext.swap_flow_event.Add(x);
+                    PersistFlowEvent(x);
                 });
                 UpdateInitalPostion(dividendEvents, td.id);
             }
@@ -823,7 +829,7 @@ namespace YLErp.Modules.SwapModule
         /// 互换更新实时持仓信息
         /// </summary>
         /// <param name="flowEvents"></param>
-        private void UpdateInitalPostion(List<swap_flow_event> flowEvents, int swapTradeId)
+        protected virtual void UpdateInitalPostion(List<swap_flow_event> flowEvents, int swapTradeId)
         {
             var positions = DbContext.swap_position.Where(x => !x.IsInitial && x.SwapTradeId == swapTradeId && !x.Invalid);
             foreach (var position in positions)

YLErpDAL/Modules/SwapModule/SwapTradeBaseService.cs

@@ -284,7 +284,7 @@ namespace YLErp.Modules.SwapModule
         /// <param name="valueDate"></param>
         /// <param name="eventTypes"></param>
         /// <returns></returns>
-        public DateTime? GetPreDealDate(int tradeId, DateTime valueDate, List<int> eventTypes)
+        public virtual DateTime? GetPreDealDate(int tradeId, DateTime valueDate, List<int> eventTypes)
         {
             Expression<Func<swap_event, bool>> eventExpression = x => x.SwapTradeId == tradeId && x.ValueDate <= valueDate && !x.Invalid && eventTypes.Contains(x.EventType);
             var swapEvent = DbContext.swap_event.Where(eventExpression).OrderByDescending(o => o.ValueDate).FirstOrDefault();