Product/1470 migration for archiving

coscine/issues#1470

src/Scaffolding/DataModel/Model.cs

-using System;
+using System;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Metadata;
 
@@ -58,9 +58,6 @@ namespace Coscine.Database.DataModel
 
         protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
         {
-            if (!optionsBuilder.IsConfigured)
-            {
-            }
         }
 
         protected override void OnModelCreating(ModelBuilder modelBuilder)
@@ -560,6 +557,11 @@ namespace Coscine.Database.DataModel
 
                 entity.Property(e => e.ApplicationProfile).HasMaxLength(500);
 
+                entity.Property(e => e.Archived)
+                    .IsRequired()
+                    .HasMaxLength(255)
+                    .HasDefaultValueSql("(N'0')");
+
                 entity.Property(e => e.DisplayName).HasMaxLength(25);
 
                 entity.Property(e => e.Keywords).HasMaxLength(1000);