Document most models

Oqtane.Shared/Models/SqlQuery.cs

@@ -1,10 +1,14 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 
 namespace Oqtane.Models
 {
     public class SqlQuery
     {
+        /// <summary>
+        /// Reference to the <see cref="Tenant"/> this belongs to
+        /// </summary>
         public int TenantId { get; set; }
+        
         public string Query { get; set; }
         public List<Dictionary<string, string>> Results { get; set; }
     }