fix:风控引擎的数据库对象不再采用全局，防止追踪所有查询出的对象

YLErpDAL/Modules/RiskEngine/RiskEngineService.cs

@@ -1,4 +1,4 @@
-using Newtonsoft.Json;
+using Newtonsoft.Json;
 using Qdp.Foundation.Utilities;
 using System.Reflection;
 using YLErp.BLL;
@@ -309,11 +309,14 @@ namespace YLErp.Modules.RiskEngine
 
             try
             {
-                _logger.Info($"[风控引擎] EvaluateRisk 开始 - TradeId: {context?.TradeId}, TriggerPoint: {triggerPoint}");
-                if (context != null && context.DbContext == null)
-                {
-                    context.DbContext = DbContext;
-                }
+                using var ruleDbContext = DbContextFactory.GetYLDbContext();
+                ruleDbContext.ChangeTracker.QueryTrackingBehavior = Microsoft.EntityFrameworkCore.QueryTrackingBehavior.NoTracking;
+
+                context ??= new RiskContext();
+                context.TriggerPoint = triggerPoint;
+                context.DbContext = ruleDbContext;
+
+                _logger.Info($"[风控引擎] EvaluateRisk 开始 - TradeId: {context.TradeId}, TriggerPoint: {triggerPoint}");
 
                 // ============================================================
                 // Step 1: 从内存缓存读取规则定义和规则应用（启动时已预热）
@@ -343,8 +346,8 @@ namespace YLErp.Modules.RiskEngine
                 // 2. 同一维度内多选按并集处理；
                 // 3. 不同维度之间按交集处理；
                 // 4. 某维度留空表示该维度不限制。
-                var trade = context != null && context.TradeId > 0
-                    ? DbContext.trade.FirstOrDefault(t => t.id == context.TradeId)
+                var trade = context.TradeId > 0
+                    ? context.DbContext.trade.AsNoTracking().FirstOrDefault(t => t.id == context.TradeId)
                     : null;
 
                 var matchedApplications = triggerMatchedApps