Add mapping for PObjectStateHist and new DTO record

Introduced a mapping configuration in `MappingProfile` to map `PObjectStateHist` to `ObjectStateHistDto`, including the `Intl` property and an array of `Others`. Added a new record `ObjectStateHistDto` with properties for `Intl`, `Others`, `ChangedWho`, and `ChangedWhen`, initializing `Others` to an empty array of strings.

src/WorkFlow.Application/Dto/ObjectStateHistDto.cs

@@ -0,0 +1,15 @@
+namespace WorkFlow.Application.Dto;
+
+public record ObjectStateHistDto
+{
+    public virtual string? Intl { get; set; }
+
+    /// <summary>
+    /// Holds state 2, 3 and 4 as a list of strings.
+    /// </summary>
+    public IEnumerable<string> Others { get; set; } = Array.Empty<string>();
+
+    public string? ChangedWho { get; set; }
+
+    public DateTime? ChangedWhen { get; set; }
+}