✨ Poll and its CRUD

DysonNetwork.Sphere/Poll/Poll.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using NodaTime;
+
+namespace DysonNetwork.Sphere.Poll;
+
+public class Poll : ModelBase
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    public List<PollQuestion> Questions { get; set; } = new();
+    
+    [MaxLength(1024)] public string? Title { get; set; }
+    [MaxLength(4096)] public string? Description { get; set; }
+    
+    public Instant? EndedAt { get; set; }
+    
+    public Guid PublisherId { get; set; }
+    public Publisher.Publisher Publisher { get; set; } = null!;
+}
+
+public enum PollQuestionType
+{
+    SingleChoice,
+    MultipleChoice,
+    YesNo,
+    Rating,
+    FreeText
+}
+
+public class PollQuestion : ModelBase
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    
+    public PollQuestionType Type { get; set; }
+    [Column(TypeName = "jsonb")] public List<PollOption>? Options { get; set; }
+    
+    [MaxLength(1024)] public string Title { get; set; } = null!;
+    [MaxLength(4096)] public string? Description { get; set; }
+    public int Order { get; set; } = 0;
+    public bool IsRequired { get; set; }
+    
+    public Guid PollId { get; set; }
+    [JsonIgnore] public Poll Poll { get; set; } = null!;
+}
+
+public class PollOption
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    [Required] [MaxLength(1024)] public string Label { get; set; } = null!;
+    [MaxLength(4096)] public string? Description { get; set; }
+    public int Order { get; set; } = 0;
+}
+
+public class PollAnswer : ModelBase
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    [Column(TypeName = "jsonb")] public Dictionary<string, JsonElement> Answer { get; set; } = null!;
+    
+    public Guid AccountId { get; set; }
+    public Guid PollId { get; set; }
+    [JsonIgnore] public Poll Poll { get; set; } = null!;
+}