Product/1470 migration for archiving

coscine/issues#1470

src/Migrations/Migrations/Migration202105261518ResourceArchiving.cs

+using FluentMigrator;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Coscine.Migrations
+{
+    [Migration(202105261518)]
+    public class Migration202105261518ResourceArchiving : FluentMigrator.Migration
+    {
+        public override void Down()
+        {
+            Delete.Column("Archived").FromTable("Resources");
+        }
+
+        public override void Up()
+        {
+            Alter.Table("Resources")
+                .AddColumn("Archived").AsString().WithDefaultValue("0");
+              
+        }
+    }
+}