cleanup(accrual): 删除orginPv死参数（3个方法签名+所有调用点）

源码实证orginPv在5/6个CalcDaily方法中是死参数（方法体不读取）：
- CalcDailyCompoundInterest: 删 decimal orginPv（3个调用点同步删）
- CalcDailyCompoundInterestByEod: 删（1个调用点+4个测试同步删）
- CalcDailySimpleInterestByEod: 删（1个调用点+2个测试同步删）

保留orginPv的方法（真实消费者）：
- CalcDailySimpleInterest: 差分公式 posiPrincipal - orginPv
- GetInterests/CalcUnwindInterest/InitSwapDealInterest: 转发链

SwapModule零回归(7基线/510通过)

UnitTestProject/Modules/SwapModule/DealInterestsScenarioTest.cs

@@ -1725,14 +1725,14 @@ namespace YLErp.Modules.SwapModule
             decimal expectedTdAmountAtEnd = 0m;
             dealService.CalcDailyCompoundInterest(
                 finalCloseDate, position, remainingNotional, expectedEndFlow, AnnualDays, false,
-                intermediateEod.FloatRate, 1m, originalNotional, true, false,
+                intermediateEod.FloatRate, 1m, true, false,
                 ref expectedAmountAtEnd, ref expectedTdAmountAtEnd);
             var expectedPreviousFlow = new swap_flow_event { InterestRate = spread };
             decimal expectedAmountAtPreviousEod = 0m;
             decimal expectedTdAmountAtPreviousEod = 0m;
             dealService.CalcDailyCompoundInterest(
                 intermediateDate, position, remainingNotional, expectedPreviousFlow, AnnualDays, false,
-                intermediateEod.FloatRate, 1m, originalNotional, true, true,
+                intermediateEod.FloatRate, 1m, true, true,
                 ref expectedAmountAtPreviousEod, ref expectedTdAmountAtPreviousEod);
             var expectedFinalInterest = intermediateEod.InterestIncomeSum
                 + expectedAmountAtEnd - expectedAmountAtPreviousEod;