Progress Overhaul + Profile Page and a LOT more! (#4262)

Co-authored-by: Amelia <77553571+Fesaa@users.noreply.github.com>
Co-authored-by: Robbie Davis <robbie@therobbiedavis.com>

API/Entities/Progress/AppUserReadingSession.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using API.Entities.Interfaces;
+using API.Services.Reading;
+using Microsoft.EntityFrameworkCore;
+
+namespace API.Entities.Progress;
+
+/// <summary>
+/// Represents a reading session for a user. See <see cref="ReadingSessionService"/>
+/// </summary>
+[Index(nameof(IsActive), IsUnique = false)]
+public class AppUserReadingSession : IEntityDate
+{
+    public int Id { get; set; }
+    public DateTime StartTime { get; set; }
+    public DateTime StartTimeUtc { get; set; }
+    public DateTime? EndTime { get; set; }
+    public DateTime? EndTimeUtc { get; set; }
+    public bool IsActive { get; set; } = true;
+    /// <summary>
+    /// Actual activity data recorded during the session
+    /// </summary>
+    public IList<AppUserReadingSessionActivityData> ActivityData { get; set; }
+    public DateTime Created { get; set; }
+    public DateTime CreatedUtc { get; set; }
+    public DateTime LastModified { get; set; }
+    public DateTime LastModifiedUtc { get; set; }
+
+
+    public int AppUserId { get; set; }
+    public virtual AppUser AppUser { get; set; }
+}