More documentation - almost all Models done

https://github.com/oqtane/oqtane.framework/issues/1382
Should not contain any code changes, just docs

Oqtane.Shared/Models/Job.cs

@@ -1,25 +1,88 @@
-using System;
+using System;
 
 namespace Oqtane.Models
 {
+    /// <summary>
+    /// Definition of a Job / Task which is run on the server.
+    /// When Jobs run, they create a <see cref="JobLog"/>
+    /// </summary>
     public class Job : IAuditable
     {
+        /// <summary>
+        /// Internal ID
+        /// </summary>
         public int JobId { get; set; }
+
+        /// <summary>
+        /// Name for simple identification
+        /// </summary>
         public string Name { get; set; }
+
+        /// <summary>
+        /// What kind of Job this is 
+        /// </summary>
         public string JobType { get; set; }
+
+        /// <summary>
+        /// Unit used in how often the job should run - expects a character like `m` (minutes), `H` (hours) etc.
+        /// </summary>
         public string Frequency { get; set; }
+
+        /// <summary>
+        /// How often the Job should run - see also <see cref="Frequency"/>
+        /// </summary>
         public int Interval { get; set; }
+
+        /// <summary>
+        /// When the Job is to be run the first time. See also <see cref="EndDate"/>.
+        /// </summary>
         public DateTime? StartDate { get; set; }
+
+
+        /// <summary>
+        /// When the job is to be run the last time. See also <see cref="StartDate"/>.
+        /// </summary>
         public DateTime? EndDate { get; set; }
+
+        /// <summary>
+        /// Determines if the Job is activated / enabled.
+        /// </summary>
         public bool IsEnabled { get; set; }
+
+        /// <summary>
+        /// If the Job has ever started running
+        /// </summary>
         public bool IsStarted { get; set; }
+
+        /// <summary>
+        /// If the Job is executing right now. 
+        /// </summary>
         public bool IsExecuting { get; set; }
+
+        /// <summary>
+        /// When the Job will run again next time.
+        /// </summary>
         public DateTime? NextExecution { get; set; }
+
+        /// <summary>
+        /// Todo: todoc - unsure what this does
+        /// </summary>
         public int RetentionHistory { get; set; }
 
+        #region IAuditable Properties
+
+        /// <inheritdoc/>
         public string CreatedBy { get; set; }
+
+        /// <inheritdoc/>
         public DateTime CreatedOn { get; set; }
+
+        /// <inheritdoc/>
         public string ModifiedBy { get; set; }
+
+        /// <inheritdoc/>
         public DateTime ModifiedOn { get; set; }
+
+        #endregion
     }
 }