update Src/Asp.Net/SqlSugar/Realization/Oracle/OracleProvider.cs.

新增 Line 90: sqlCommand.InitialLONGFetchSize = -1;
说明：默认值为0，修改为-1后未发现明显异常。应当可以将默认值修改为-1.
解决Oracle联查时无法正确获取到Long Raw=>byte[]的值。
原因：Oracle.ManagedDataAccess 未正确配置引起
参考文章：
[1]https://docs.oracle.com/cd/E85694_01/ODPNT/CommandInitialLONGFetchSize.htm
[2]https://renenyffenegger.ch/notes/Microsoft/dot-net/namespaces-classes/Oracle/ManagedDataAccess/long-raw

Src/Asp.Net/SqlSugar/Realization/Oracle/OracleProvider.cs

@@ -1,4 +1,4 @@
-using Oracle.ManagedDataAccess.Client;
+using Oracle.ManagedDataAccess.Client;
 using System;
 using System.Collections.Generic;
 using System.Data;
@@ -87,6 +87,7 @@ namespace SqlSugar
             sqlCommand.BindByName = true;
             sqlCommand.CommandType = this.CommandType;
             sqlCommand.CommandTimeout = this.CommandTimeOut;
+            sqlCommand.InitialLONGFetchSize = -1;
             if (this.Transaction != null)
             {
                 sqlCommand.Transaction = (OracleTransaction)this.Transaction;