feat: implement identity authentication, authorization policies, and MAUI platform support with Docker orchestration

src/NexusReader.Domain/Entities/QuizResult.cs

@@ -0,0 +1,30 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace NexusReader.Domain.Entities;
+
+/// <summary>
+/// Tracks the result of an AI-generated quiz completed by a user.
+/// </summary>
+public class QuizResult
+{
+    [Key]
+    public Guid Id { get; set; } = Guid.NewGuid();
+
+    [Required]
+    public string UserId { get; set; } = string.Empty;
+
+    [ForeignKey(nameof(UserId))]
+    public NexusUser? User { get; set; }
+
+    [Required]
+    public string Topic { get; set; } = string.Empty;
+
+    public int Score { get; set; }
+    
+    public int TotalQuestions { get; set; }
+
+    public double Percentage => TotalQuestions > 0 ? (double)Score / TotalQuestions * 100 : 0;
+
+    public DateTime CompletedDate { get; set; } = DateTime.UtcNow;
+}