fix: 修复国联收益互换交易编号首次生成大小写不一致

- 首次入库后按 UpperTradeNumber 配置统一交易编号大小写
- 避免自动生成小写编号在后续编辑保存时被转为大写
- 补充交易编号大小写配置的单元测试

UnitTestProject/Modules/TradeModule/DocGenerateModule/GuolianContractNoGeneratorTest.cs

@@ -33,6 +33,19 @@ namespace YLErp.UnitTestProject.Modules.TradeModule.DocGenerateModule
                 blankTrade, CompanyEnum.国泰君安));
         }
 
+        [DataTestMethod]
+        [DataRow("GLMS-st0728-20260729-FICC-Q-210210IB", true, "GLMS-ST0728-20260729-FICC-Q-210210IB")]
+        [DataRow("GLMS-st0728-20260729-FICC-Q-210210IB", false, "GLMS-st0728-20260729-FICC-Q-210210IB")]
+        public void NormalizeTradeNumberCase_AppliesUpperTradeNumberConfiguration(
+            string tradeNumber,
+            bool upperTradeNumber,
+            string expected)
+        {
+            var actual = GuolianContractNoGenerator.NormalizeTradeNumberCase(tradeNumber, upperTradeNumber);
+
+            Assert.AreEqual(expected, actual);
+        }
+
         [TestMethod]
         public void BuildTradeNumber_ClientTrade_UsesNumericSequenceAndSanitizesUnderlyingCode()
         {