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/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
+}