✅ How to handle complex Include in EF Core

public class PlanEntity : ISortable {
    public int Id { get; set; }
    public int SortPriority { get; set; }
    public string Label { get; set; }
    public string PlanId { get; set; }
    public List<TaskSetEntity> TaskSets { get; set; } = [];

    public DateTime? StartDate { get; set; }
    public DateTime? ReadyToTreatDate { get; set; }
    public List<ApplicationUser> Authors { get; set; } = [];
    public SiteEntity TreatmentSite { get; set; }
    public TechniqueEntity Technique { get; set; }
    public RegionEntity TreatedRegion { get; set; }

    public Plan ToPlan() => new Plan {
        Id = Id,
        Label = Label,
        Authors = Authors.Select(x => x.UserName).ToArray(),
        TaskSets = TaskSets.Select(x => new TaskSet {
            Id = x.Id,
            Label = x.Label,
            Colour = x.Color,
            IsHidden = x.IsHidden,
            Checks = x.Checks.ToChecks()}).ToArray(),
        TreatedSite = TreatmentSite is null ? new Site { Name = string.Empty } : TreatmentSite.ToSite(),
        Technique = Technique is null ? new Technique { Name = string.Empty } : Technique.ToTechnique(),
        TreatedRegion = TreatedRegion is null ? new Region { Name = string.Empty } : TreatedRegion.ToRegion(),
    };
}

public static class PlanExtensions {
    public static Plan[] ToPlans(this List<PlanEntity> entities) => entities
        .OrderBy(x => x.SortPriority)
        .Select(x => x.ToPlan())
        .ToArray();
}

public class PlanEntity : ISortable {
    public int Id { get; set; }
    public int SortPriority { get; set; }
    public string Label { get; set; }
    public string PlanId { get; set; }
    public List<TaskSetEntity> TaskSets { get; set; } = [];

    public DateTime? StartDate { get; set; }
    public DateTime? ReadyToTreatDate { get; set; }
    public List<ApplicationUser> Authors { get; set; } = [];
    public SiteEntity TreatmentSite { get; set; }
    public TechniqueEntity Technique { get; set; }
    public RegionEntity TreatedRegion { get; set; }

    public Plan ToPlan() => new Plan {
        Id = Id,
        Label = Label,
        Authors = Authors.Select(x => x.UserName).ToArray(),
        TaskSets = TaskSets.Select(x => new TaskSet {
            Id = x.Id,
            Label = x.Label,
            Colour = x.Color,
            IsHidden = x.IsHidden,
            Checks = x.Checks.ToChecks()}).ToArray(),
        TreatedSite = TreatmentSite is null ? new Site { Name = string.Empty } : TreatmentSite.ToSite(),
        Technique = Technique is null ? new Technique { Name = string.Empty } : Technique.ToTechnique(),
        TreatedRegion = TreatedRegion is null ? new Region { Name = string.Empty } : TreatedRegion.ToRegion(),
    };
}

public static class PlanExtensions {
    public static Plan[] ToPlans(this List<PlanEntity> entities) => entities
        .OrderBy(x => x.SortPriority)
        .Select(x => x.ToPlan())
        .ToArray();
}