修复启动创建导致的部分dbcontext没有回收的bug

src/ShardingCore/DynamicDataSources/DefaultDataSourceInitializer.cs

@@ -54,7 +54,8 @@ namespace ShardingCore.DynamicDataSources
             {
                 using (_virtualDataSourceManager.CreateScope(virtualDataSource.ConfigId))
                 {
-                    using var context = serviceScope.ServiceProvider.GetService<TShardingDbContext>();
+                    using (var context = serviceScope.ServiceProvider.GetService<TShardingDbContext>())
+                    {
                         if (_entityConfigOptions.EnsureCreatedWithOutShardingTable || !isOnStart)
                             EnsureCreated(virtualDataSource, context, dataSourceName);
                         else if (_entityConfigOptions.CreateDataBaseOnlyOnStart.GetValueOrDefault())
@@ -98,6 +99,7 @@ namespace ShardingCore.DynamicDataSources
                     }
                 }
             }
+        }
 
         private void CreateDataTable(string dataSourceName, IVirtualTable virtualTable, ISet<string> existTables,
             bool isOnStart)
@@ -164,21 +166,12 @@ namespace ShardingCore.DynamicDataSources
         {
             if (context is IShardingDbContext shardingDbContext)
             {
-                var dbContext =
-                    shardingDbContext.GetDbContext(dataSourceName, false, _routeTailFactory.Create(string.Empty));
-
+                using (var dbContext =
+                       shardingDbContext.GetDbContext(dataSourceName, false,
+                           _routeTailFactory.Create(string.Empty, false)))
+                {
                     var isDefault = virtualDataSource.IsDefault(dataSourceName);
 
-                var modelCacheSyncObject = dbContext.GetModelCacheSyncObject();
-
-                var acquire = Monitor.TryEnter(modelCacheSyncObject, TimeSpan.FromSeconds(3));
-                if (!acquire)
-                {
-                    throw new ShardingCoreException("cant get modelCacheSyncObject lock");
-                }
-
-                try
-                {
                     if (isDefault)
                     {
                         dbContext.RemoveDbContextRelationModelThatIsShardingTable();
@@ -189,11 +182,6 @@ namespace ShardingCore.DynamicDataSources
                     }
 
                     dbContext.Database.EnsureCreated();
-                    dbContext.RemoveModelCache();
-                }
-                finally
-                {
-                    Monitor.Exit(modelCacheSyncObject);
                 }
             }
         }
@@ -208,7 +196,6 @@ namespace ShardingCore.DynamicDataSources
                     dbContext.RemoveDbContextAllRelationModel();
                     dbContext.Database.EnsureCreated();
                 }
-
             }
         }
     }

src/ShardingCore/TableCreator/ShardingTableCreator.cs

@@ -50,7 +50,9 @@ namespace ShardingCore.TableCreator
         {
             using (var serviceScope = _serviceProvider.CreateScope())
             {
-                var dbContext = serviceScope.ServiceProvider.GetService<TShardingDbContext>();
+                using (var dbContext = serviceScope.ServiceProvider.GetService<TShardingDbContext>())
+                {
+                    
                     var shardingDbContext = (IShardingDbContext)dbContext;
                     using (var context = shardingDbContext.GetDbContext(dataSourceName, false,
                                _routeTailFactory.Create(tail, false)))
@@ -74,4 +76,5 @@ namespace ShardingCore.TableCreator
                 }
             }
         }
+    }
 }