❔ EFCORE DESIGN ONE TO MANY

public async Task<Conversation?> FindByNameAsync(string name, CancellationToken cancellationToken = default)
        => await _dbSet.Include(conversation => conversation!.ChatMessages)
                            .ThenInclude(chatMessage => chatMessage.User)
                        .Take(10).FirstOrDefaultAsync(x => x.Name == name!, cancellationToken);

public virtual ICollection<ChatMessage> ChatMessages { get; set; } = new HashSet<ChatMessage>();

        builder.Entity<ChatMessage>(entity =>
        {
            entity.HasOne(i => i.User).WithMany(s => s!.ChatMessages).OnDelete(DeleteBehavior.Cascade);
        });