Added a pause between indexing steps for shared embedding servers (#1114)

app/MindWork AI Studio/Tools/Services/Indexing/PauseBeforeStep.cs

@@ -0,0 +1,14 @@
+namespace AIStudio.Tools.Services.Indexing;
+
+/// <summary>
+/// How long the indexing step which is about to start waits, cf. PauseBetweenSteps.GetPauseBeforeNextStep.
+/// </summary>
+/// <param name="Pause">The pause drawn for the gap since the last step.</param>
+/// <param name="Remaining">What is left of the pause now. More than zero, unless this is NONE.</param>
+internal sealed record PauseBeforeStep(TimeSpan Pause, TimeSpan Remaining)
+{
+    /// <summary>
+    /// The step starts right away.
+    /// </summary>
+    public static readonly PauseBeforeStep NONE = new(TimeSpan.Zero, TimeSpan.Zero);
+}