public void Configure(EntityTypeBuilder <ParsingStatus> b)
        {
            b.HasKey(x => new { x.FileId, x.Source });
            b.Property(x => x.Md5).IsRequired();
            b.AddShadowTimeTracking();

            b.Property(x => x.FileId);
            b.Property(x => x.Source);
        }
 public void Configure(EntityTypeBuilder <SourceActualizingState> b)
 {
     b.HasKey(x => x.Source);
     b.AddShadowTimeTracking();
 }