Add explicit @RC handling in SQL for delete/update procs

Updated DeleteObjectProcedureHandler and UpdateObjectProcedureHandler to declare, initialize, and select the @RC variable in their SQL command strings. This ensures the stored procedure return code is explicitly captured and returned by the query.

src/ReC.Application/Common/Procedures/DeleteProcedure/DeleteObjectProcedure.cs

@@ -60,6 +60,7 @@ public class DeleteObjectProcedureHandler(IRepository repo) : IRequestHandler<De
         };
 
         var result = await repo.ExecuteQueryRawAsync(
+            "DECLARE @RC SMALLINT = 0; " +
             "EXEC @RC = [dbo].[PRREC_DELETE_OBJECT] " +
             "@pENTITY, @pSTART, @pEND, @pFORCE; " +
             "SELECT @RC;",