Lots of data and model setup

SVSim.Database/Models/SleeveEntry.cs

@@ -0,0 +1,13 @@
+using DCGEngine.Database.Models;
+
+namespace SVSim.Database.Models;
+
+public class SleeveEntry : BaseEntity<int>
+{
+    #region Navigation Properties
+
+    public List<Viewer> Viewers = new List<Viewer>();
+
+    #endregion
+
+}