refactor(accrual): 抽取BuildSegmentRates共享分段取率+清理needPrice死参数

- 抽取 BuildSegmentRates：统一单利/复利分段取率循环，参数化 fetchAfterDate (单利传 ValueDate 仅取新段，复利传 null 全程取)

- 修复 BuildSegmentRates static→instance：访问实例属性 IndexFixer

- 清理 CalcDaily 层 needPrice 死参数：4个 CalcDaily* 方法签名移除 needPrice；上层 CalcSwapInterests/GetInterests 保留 (virtual seam/位置参数兼容)

- 修复 6 处调用点 needPrice 参数传递

- 新增影子测试：单利+FR007浮动+部分平仓+历史归档，验证 segmentRates 一致

- 新增 TdCarryInCharacterizationTest：钉死部分平仓 TdInterestAmount carry-in 行为

测试: 511通过 / 7预存在失败(数据依赖) / 9跳过

YLErpDAL/Modules/SwapModule/SwapDealService.cs

@@ -946,12 +946,12 @@ namespace YLErp.Modules.SwapModule
                 if (position.InterestType == (int)InterestTypeEnum.复利)
                 {
                     // 复利计算
-                    CalcDailyCompoundInterestByEod(preEod, valueDate, td.StartDate.Value, position, closePrincipal, posiPrincipal, interest, annualDays, false, eodFloatRate, 1m, ref interestAmount, ref tdInterestAmount);
+                    CalcDailyCompoundInterestByEod(preEod, valueDate, td.StartDate.Value, position, closePrincipal, posiPrincipal, interest, annualDays, eodFloatRate, 1m, ref interestAmount, ref tdInterestAmount);
                 }
                 else
                 {
                     // 单利计算
-                    CalcDailySimpleInterestByEod(preEod, valueDate, td.StartDate.Value, position, closePrincipal, posiPrincipal, interest, annualDays, false, eodFloatRate, 1m, ref interestAmount, ref tdInterestAmount);
+                    CalcDailySimpleInterestByEod(preEod, valueDate, td.StartDate.Value, position, closePrincipal, posiPrincipal, interest, annualDays, eodFloatRate, 1m, ref interestAmount, ref tdInterestAmount);
                 }
 
             }
@@ -1121,7 +1121,7 @@ namespace YLErp.Modules.SwapModule
                     // 把上日尚未实现的的利息 按本次平掉的这部分计息基数分给本次平仓 并在重置日并入计息基数
                     // 它只在当前 endDate 恰好为重置日时使用，避免把同一笔历史利息重复资本化。
                     var resetCarryInterest = preEodPosition.InterestIncomeSum * remainingPercent;
-                    CalcDailyCompoundInterest(endDate, position, closePosiNotionalValue, interest, annualDays, needPrice,
+                    CalcDailyCompoundInterest(endDate, position, closePosiNotionalValue, interest, annualDays,
                         floateRate, closePrecent, calcFirst, calcLast, ref InterestAmount, ref TdInterestAmount,
                         consumedInterest, resetCarryInterest);
                     if (preEodPosition.id != 0 && closePrecent == 1m)
@@ -1149,7 +1149,7 @@ namespace YLErp.Modules.SwapModule
                         }
                         // 计算截至本次平仓日的累计利息 amountAtEnd
                         CalcDailyCompoundInterest(replayEndDate, position, closePosiNotionalValue,
-                            interestAtEnd, annualDays, needPrice, floateRate, closePrecent,
+                            interestAtEnd, annualDays, floateRate, closePrecent,
                             calcFirst, calcLast, ref amountAtEnd, ref tdAmountAtEnd, consumedInterest);
                         var interestAtPreviousEod = new swap_flow_event { InterestRate = rate };
                         decimal amountAtPreviousEod = 0m;
@@ -1158,7 +1158,7 @@ namespace YLErp.Modules.SwapModule
                         // 因此此处按闭区间包含上一日终当天，避免算头不算尾时重复加入该日利息。
                         // 计算截至上一日终累积的利息 amountAtPreviousEod
                         CalcDailyCompoundInterest(preEodPosition.ValueDate, position, closePosiNotionalValue,
-                            interestAtPreviousEod, annualDays, needPrice, floateRate, closePrecent,
+                            interestAtPreviousEod, annualDays, floateRate, closePrecent,
                             calcFirst, true, ref amountAtPreviousEod, ref tdAmountAtPreviousEod, consumedInterest);
                         // 例如 0004：5/18 待实现 -118631.261797，加 5/19 新增约 -4648.912760，
                         // 得到最终应结 -123280.174557，按金额两位落为 Excel BN 的 -123280.17。
@@ -1170,7 +1170,7 @@ namespace YLErp.Modules.SwapModule
                 }
                 else
                 {
-                    CalcDailySimpleInterest(preEodPosition, endDate, position, posiNotionalValue, interest, annualDays, needPrice, floateRate, closePrecent, orginPv, calcFirst, calcLast, ref InterestAmount, ref TdInterestAmount);
+                    CalcDailySimpleInterest(preEodPosition, endDate, position, posiNotionalValue, interest, annualDays, floateRate, closePrecent, orginPv, calcFirst, calcLast, ref InterestAmount, ref TdInterestAmount);
                 }
 
                 interest.InterestAmount = Math.Round(InterestAmount, InterestCalculationPrecision, MidpointRounding.AwayFromZero);
@@ -1231,7 +1231,7 @@ namespace YLErp.Modules.SwapModule
         /// <param name="annualDays">年化天数</param>
         /// <returns></returns>
         public void CalcDailyCompoundInterest(DateTime endDate, swap_position position, decimal principal, swap_flow_event flowEvent,
-            int annualDays, bool needPrice, decimal floateRate, decimal closePercent, bool calcFirst, bool calcLast,
+            int annualDays, decimal floateRate, decimal closePercent, bool calcFirst, bool calcLast,
             ref decimal InterestAmount, ref decimal TdInterestAmount, decimal consumedInterest = 0m, decimal resetCarryInterest = 0m)
         {
             var startDate = position.PosiStartDate;
@@ -1270,7 +1270,7 @@ namespace YLErp.Modules.SwapModule
         /// <summary>
         /// 计算单利 盘中（按重置天数分段，每段使用对应浮动利率）
         /// </summary>
-        public void CalcDailySimpleInterest(eod_swap_position preEodPosition, DateTime endDate, swap_position position, decimal posiPrincipal, swap_flow_event flowEvent, int annualDays, bool needPrice, decimal floateRate, decimal closePercent, decimal orginPv, bool calcFirst, bool calcLast, ref decimal InterestAmount, ref decimal TdInterestAmount, decimal consumedInterest = 0m)
+        public void CalcDailySimpleInterest(eod_swap_position preEodPosition, DateTime endDate, swap_position position, decimal posiPrincipal, swap_flow_event flowEvent, int annualDays, decimal floateRate, decimal closePercent, decimal orginPv, bool calcFirst, bool calcLast, ref decimal InterestAmount, ref decimal TdInterestAmount, decimal consumedInterest = 0m)
         {
             var startDate = position.PosiStartDate;
             int interestPeriod = position.interest_rest_days ?? 1;
@@ -1320,7 +1320,7 @@ namespace YLErp.Modules.SwapModule
         /// <param name="isAnnualized">是否年化</param>
         /// <param name="annualDays">年化天数</param>
         /// <returns></returns>
-        public void CalcDailyCompoundInterestByEod(eod_swap_position preEodPosition, DateTime endDate, DateTime tradeDate, swap_position position, decimal principal, decimal posiPrincipal, swap_flow_event flowEvent, int annualDays, bool needPrice, decimal floateRate, decimal closePercent, ref decimal InterestAmount, ref decimal TdInterestAmount)
+        public void CalcDailyCompoundInterestByEod(eod_swap_position preEodPosition, DateTime endDate, DateTime tradeDate, swap_position position, decimal principal, decimal posiPrincipal, swap_flow_event flowEvent, int annualDays, decimal floateRate, decimal closePercent, ref decimal InterestAmount, ref decimal TdInterestAmount)
         {
             int interestPeriod = position.interest_rest_days ?? 1;
             var isResetDay = (endDate - tradeDate).Days % interestPeriod == 0;
@@ -1367,7 +1367,7 @@ namespace YLErp.Modules.SwapModule
         /// <summary>
         /// 计算单利 收盘（按重置天数分段，每段使用对应浮动利率）
         /// </summary>
-        public void CalcDailySimpleInterestByEod(eod_swap_position preEodPosition, DateTime endDate, DateTime tradeDate, swap_position position, decimal principal, decimal posiPrincipal, swap_flow_event flowEvent, int annualDays, bool needPrice, decimal floateRate, decimal closePercent, ref decimal InterestAmount, ref decimal TdInterestAmount)
+        public void CalcDailySimpleInterestByEod(eod_swap_position preEodPosition, DateTime endDate, DateTime tradeDate, swap_position position, decimal principal, decimal posiPrincipal, swap_flow_event flowEvent, int annualDays, decimal floateRate, decimal closePercent, ref decimal InterestAmount, ref decimal TdInterestAmount)
         {
             // 首次操作（preEod.id == 0）：计息基数按存量本金初始化——保留旧行为（含对 preEod 的就地修正）。
             if (preEodPosition.id == 0)