feat(transport): add IAuditCorrelationContext scoped service

src/ScadaLink.ConfigurationDatabase/Services/AuditCorrelationContext.cs

@@ -0,0 +1,14 @@
+using ScadaLink.Commons.Interfaces.Transport;
+
+namespace ScadaLink.ConfigurationDatabase.Services;
+
+/// <summary>
+/// Per-scope mutable holder for the active bundle import id. AuditService reads it
+/// while writing AuditLogEntry rows. Registered as Scoped so each Blazor circuit /
+/// request gets its own value; ApplyAsync explicitly creates a service scope and
+/// sets the id at the top of the transaction.
+/// </summary>
+public sealed class AuditCorrelationContext : IAuditCorrelationContext
+{
+    public Guid? BundleImportId { get; set; }
+}