- 增加 DbContext/Repository ManyToMany联级保存功能（之前已支持OneToMany）；

FreeSql.DbContext/Repository/Repository/BaseRepository.cs

@@ -59,6 +59,7 @@ namespace FreeSql
         }
         public Type EntityType => _dbsetPriv?.EntityType ?? typeof(TEntity);
         public void AsType(Type entityType) => _dbset.AsType(entityType);
+        public DbContextOptions DbContextOptions { get => _db.Options; set => _db.Options = value; }
 
         public IFreeSql Orm { get; private set; }
         public IUnitOfWork UnitOfWork { get; set; }

FreeSql.DbContext/Repository/Repository/IBaseRepository.cs

@@ -17,6 +17,11 @@ namespace FreeSql
         /// <param name="entityType"></param>
         /// <returns></returns>
         void AsType(Type entityType);
+
+        /// <summary>
+        /// 设置 DbContext 选项
+        /// </summary>
+        DbContextOptions DbContextOptions { get; set; }
     }
 
     public interface IBaseRepository<TEntity> : IReadOnlyRepository<TEntity>, IBasicRepository<TEntity>