Use JSON columns instead of junction tables

API/Entities/Enums/ReadingProfileKind.cs

@@ -0,0 +1,17 @@
+namespace API.Entities.Enums;
+
+public enum ReadingProfileKind
+{
+    /// <summary>
+    /// Generate by Kavita when registering a user, this is your default profile
+    /// </summary>
+    Default,
+    /// <summary>
+    /// Created by the user in the UI or via the API
+    /// </summary>
+    User,
+    /// <summary>
+    /// Automatically generated by Kavita to tracked changes made in the readers
+    /// </summary>
+    Implicit
+}