Show time passed since ban instead of "forever"

reworked event api to include all events (sans unknown)

SharedLibraryCore/Database/Models/EFChangeHistory.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Text;
+
+namespace SharedLibraryCore.Database.Models
+{
+    /// <summary>
+    /// This class models the change to different entities 
+    /// </summary>
+    public class EFChangeHistory : SharedEntity
+    {
+        public enum ChangeType
+        {
+            Permission
+        }
+        
+        [Key]
+        public int ChangeHistoryId { get; set; }
+        public int OriginEntityId { get; set; }
+        public int TargetEntityId { get; set; }
+        public ChangeType TypeOfChange { get; set; }
+        public DateTime TimeChanged { get; set; } = DateTime.UtcNow;
+        [MaxLength(128)]
+        public string Comment { get; set; }
+    }
+}