feat(interest): 融资腿计息接入 trace 并常驻落盘

FundingLegAccrual.AccrueSimpleEod 接 InterestTrace；SwapCalcTrace 新增 Persist
把收集器条目经 Critical 无条件落盘(与开关无关)；已迁移的 EOD 单利适配器
CalcDailySimpleInterestByEod 创建并 Persist trace。纯增量、数值逻辑不变。

YLErpDAL/Modules/SwapModule/SwapDealService.cs

@@ -3,6 +3,7 @@ using Newtonsoft.Json;
 using YLErp.BLL;
 using YLErp.BLL.Eod;
 using YLErp.DBModels.Enums;
+using YLErp.Core.Interest;
 using YLErp.Derivatives.Interest;
 using YLErp.Helpers;
 using YLErp.Modules.DataProviderModule;
@@ -1591,6 +1592,8 @@ namespace YLErp.Modules.SwapModule
                 resetPeriodDays: position.interest_rest_days ?? 1,
                 annualDays: annualDays,
                 isAnnualized: position.IsAnnualized);
+            // 完整计息 trace：收集器由适配器创建，随后经 SwapCalcTrace 常驻落盘（关键路径日志，无条件）。
+            var interestTrace = new InterestTrace();
             var result = FundingLegAccrual.AccrueSimpleEod(
                 priorUnrealized: preEodPosition.InterestProfitSum,
                 priorAccrualPrincipal: preEodPosition.TdInterestPrincipal,
@@ -1598,9 +1601,12 @@ namespace YLErp.Modules.SwapModule
                 closeRatio: closePercent,
                 originalPv: orginPv,
                 rate: legRate,
-                policy: accrualPolicy);
+                policy: accrualPolicy,
+                eodDate: endDate,
+                trace: interestTrace);
             InterestAmount = result.Accrued;
             TdInterestAmount = result.AccruedToday;
+            SwapCalcTrace.Persist(interestTrace);
         }
 
         /// <summary>