feat(siteruntime): OperationTrackingStore site-local SQLite (#23 M3)

src/ScadaLink.SiteRuntime/Tracking/OperationTrackingOptions.cs

@@ -0,0 +1,21 @@
+namespace ScadaLink.SiteRuntime.Tracking;
+
+/// <summary>
+/// Options for <see cref="OperationTrackingStore"/> — site-local cached-call
+/// tracking SQLite store (Audit Log #23 / M3).
+/// </summary>
+public class OperationTrackingOptions
+{
+    /// <summary>
+    /// Full ADO.NET connection string for the SQLite database (e.g.
+    /// <c>"Data Source=site-tracking.db"</c>). Tests use the
+    /// <c>Mode=Memory;Cache=Shared</c> form to keep the database in-memory.
+    /// </summary>
+    public string ConnectionString { get; set; } = "Data Source=site-tracking.db";
+
+    /// <summary>
+    /// Retention window for terminal tracking rows. The default purge cadence
+    /// (driven by the host) deletes terminal rows older than this many days.
+    /// </summary>
+    public int RetentionDays { get; set; } = 7;
+}