docs(auditlog): mark follow-ups complete in roadmap; refresh stale comments

src/ScadaLink.Communication/CommunicationService.cs

@@ -355,6 +355,14 @@ public class CommunicationService
     /// owning site and replies a <see cref="RetrySiteCallResponse"/> carrying a
     /// distinct site-unreachable outcome. Central never mutates the central
     /// <c>SiteCalls</c> mirror row.
+    /// <para>
+    /// This outer Ask uses <see cref="CommunicationOptions.QueryTimeout"/>
+    /// (default 30s), which must outlive the inner site relay Ask the
+    /// <c>SiteCallAuditActor</c> issues with <c>SiteCallAuditOptions.RelayTimeout</c>
+    /// (default 10s). The inner relay must time out first so its distinct
+    /// <c>SiteUnreachable</c> outcome reaches us; were this outer Ask to expire
+    /// first, that outcome would be lost to a generic Ask-timeout exception.
+    /// </para>
     /// </summary>
     public async Task<RetrySiteCallResponse> RetrySiteCallAsync(
         RetrySiteCallRequest request, CancellationToken cancellationToken = default)