- 增加 FreeSql.DbContext 实体对象的变化事件；

> 文档：https://github.com/2881099/FreeSql/wiki/DbContext#%E5%AE%9E%E4%BD%93%E5%8F%98%E5%8C%96%E4%BA%8B%E4%BB%B6
- 补充 Aop.CurdBefore 事件参数 Table 实体类型的元数据；

Examples/dbcontext_01/Controllers/ValuesController.cs

@@ -28,6 +28,11 @@ namespace dbcontext_01.Controllers
         [HttpGet]
         async public Task<string> Get()
         {
+            _orm.SetDbContextOptions(opt => {
+                opt.OnEntityChange = changeReport => {
+                    Console.WriteLine(changeReport);
+                };
+            });
 
             long id = 0;
 
@@ -150,7 +155,7 @@ namespace dbcontext_01.Controllers
 
                 using (var uow = _orm.CreateUnitOfWork())
                 {
-
+                    
                     var reposSong = uow.GetRepository<Song, int>();
                     reposSong.Where(a => a.Id > 10).ToList();
                     //查询结果，进入 states

Examples/dbcontext_01/dbcontext_01.csproj

@@ -6,8 +6,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-	  <PackageReference Include="FreeSql.Extensions.LazyLoading" Version="0.10.2" />
-	  <PackageReference Include="FreeSql.Provider.Sqlite" Version="0.10.2" />
 	  <PackageReference Include="Microsoft.AspNetCore.App" />
 	  <PackageReference Include="Swashbuckle.AspNetCore" Version="4.0.1" />
 	  <PackageReference Include="Swashbuckle.AspNetCore.Annotations" Version="4.0.1" />
@@ -15,7 +13,9 @@
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\..\Extensions\FreeSql.Extensions.LazyLoading\FreeSql.Extensions.LazyLoading.csproj" />
     <ProjectReference Include="..\..\FreeSql.DbContext\FreeSql.DbContext.csproj" />
+    <ProjectReference Include="..\..\Providers\FreeSql.Provider.Sqlite\FreeSql.Provider.Sqlite.csproj" />
   </ItemGroup>
 
 </Project>