Конфигурация через Fluent API vs Data Annotations?

[Table("customers")]
[Index(nameof(Email), IsUnique = true)]
public class Customer
{
    [Key]
    public int Id { get; set; }

    [Required, MaxLength(254)]
    public string Email { get; set; } = "";

    [Column("full_name", TypeName = "varchar(200)")]
    public string? FullName { get; set; }

    [Precision(18, 2)]
    public decimal Balance { get; set; }

    [Timestamp]                                    // rowversion для оптимистичной конкурентности
    public byte[] Version { get; set; } = [];

    [NotMapped]
    public string DisplayName => FullName ?? Email;
}

public sealed class OrderConfiguration : IEntityTypeConfiguration<Order>
{
    public void Configure(EntityTypeBuilder<Order> b)
    {
        b.ToTable("orders", t => t.HasCheckConstraint("ck_orders_total_positive", "total >= 0"));
        b.HasKey(o => o.Id);
        b.Property(o => o.Id).UseIdentityAlwaysColumn();

        b.Property(o => o.Number).HasMaxLength(20).IsRequired();
        b.HasIndex(o => o.Number).IsUnique();
        b.HasIndex(o => new { o.CustomerId, o.CreatedAt }).HasFilter("status <> 'Cancelled'");  // частичный индекс

        b.Property(o => o.Status).HasConversion<string>().HasMaxLength(20);   // enum как строка
        b.Property(o => o.Total).HasPrecision(18, 2);
        b.Property(o => o.CreatedAt).HasDefaultValueSql("now()");

        b.OwnsOne(o => o.ShippingAddress, a =>                              // value object
        {
            a.Property(x => x.City).HasColumnName("ship_city").HasMaxLength(100);
            a.Property(x => x.Street).HasColumnName("ship_street").HasMaxLength(200);
        });

        b.HasOne(o => o.Customer).WithMany(c => c.Orders)
            .HasForeignKey(o => o.CustomerId).OnDelete(DeleteBehavior.Restrict);

        b.HasMany(o => o.Items).WithOne().HasForeignKey(i => i.OrderId).OnDelete(DeleteBehavior.Cascade);
        b.Navigation(o => o.Items).UsePropertyAccessMode(PropertyAccessMode.Field);   // приватное поле _items

        b.Property(o => o.Version).IsRowVersion();
        b.HasQueryFilter(o => !o.IsDeleted);                                         // soft delete
    }
}

protected override void OnModelCreating(ModelBuilder modelBuilder) =>
    modelBuilder.ApplyConfigurationsFromAssembly(typeof(ShopDbContext).Assembly);

protected override void ConfigureConventions(ModelConfigurationBuilder cfg)
{
    cfg.Properties<decimal>().HavePrecision(18, 2);          // все decimal
    cfg.Properties<string>().HaveMaxLength(500);             // все строки по умолчанию
    cfg.Properties<DateTime>().HaveConversion<UtcDateTimeConverter>();
    cfg.Properties<Money>().HaveConversion<MoneyConverter>(); // свой тип-значение
}

// snake_case имён — пакет EFCore.NamingConventions
builder.Services.AddDbContext<ShopDbContext>(o => o.UseNpgsql(conn).UseSnakeCaseNamingConvention());