Add ResultType enum and Result property in ProfileHistory

Introduced a new `ResultType` enum to represent job execution
result types, including `Ok`, `Error`, `Warning`, and `Unknown`.
Added a `Result` property in the `ProfileHistory` class as a
wrapper around the `ResultId` property, with logic to map
`ResultId` to `ResultType` values. Updated `ProfileHistory.cs`
to include necessary namespaces.

ECMJobRunner.Domain/Entities/ProfileHistory.cs

@@ -1,3 +1,4 @@
+using ECMJobRunner.Domain.ValueObjects;
 using System;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
@@ -35,6 +36,18 @@ namespace ECMJobRunner.Domain.Entities
         [Column("RESULT_ID")]
         public byte ResultId { get; set; }
 
+        /// <summary>
+        /// Gets or sets the result type of the job execution.
+        /// This property is not mapped to a database column; it wraps <see cref="ResultId"/>.
+        /// If <see cref="ResultId"/> does not correspond to a defined <see cref="ResultType"/> value, returns <see cref="ResultType.Unknown"/>.
+        /// </summary>
+        [NotMapped]
+        public ResultType Result
+        {
+            get => Enum.IsDefined(typeof(ResultType), ResultId) ? (ResultType)ResultId : ResultType.Unknown;
+            set => ResultId = (byte)value;
+        }
+
         /// <summary>
         /// Result text/message
         /// </summary>

ECMJobRunner.Domain/ValueObjects/ResultType.cs

@@ -0,0 +1,27 @@
+namespace ECMJobRunner.Domain.ValueObjects;
+
+/// <summary>
+/// Represents the result type of a job execution.
+/// </summary>
+public enum ResultType : byte
+{
+    /// <summary>
+    /// The operation completed successfully.
+    /// </summary>
+    Ok = 0,
+
+    /// <summary>
+    /// The operation encountered an error.
+    /// </summary>
+    Error = 1,
+
+    /// <summary>
+    /// The operation completed with warnings.
+    /// </summary>
+    Warning = 2,
+
+    /// <summary>
+    /// The operation result is unknown.
+    /// </summary>
+    Unknown = 255
+}