docs(xml): fill missing XML doc comments + strip task-tracking refs across src (fixdocs)

Add missing <summary>/<param>/<returns>/<typeparam> tags and switch
interface implementations to <inheritdoc/> across 106 files; strip
project bookkeeping identifiers (Task NN, #05-TNN, PLAN-04, StoreAndForward-0NN)
from shipped code comments while preserving the descriptive rationale.
Comment-only: zero code-logic lines changed; solution builds 0/0.

Claude-Session: https://claude.ai/code/session_01MtdgwpEeCUn6cUA5f1LMPj

src/ZB.MOM.WW.ScadaBridge.HealthMonitoring/CentralHealthAggregator.cs

@@ -110,7 +110,7 @@ public class CentralHealthAggregator : BackgroundService, ICentralHealthAggregat
                 // Unknown site — register it as online, awaiting its first
                 // full report. LatestReport and LastReportReceivedAt both stay
                 // null until ProcessReport runs — "no report yet" is an explicit
-                // nullable state, not a year-0001 sentinel the UI must special-case.
+                // nullable state, not a DateTime.MinValue sentinel the UI must special-case.
                 var registered = new SiteHealthState
                 {
                     SiteId = siteId,

src/ZB.MOM.WW.ScadaBridge.HealthMonitoring/IHealthReportTransport.cs

@@ -19,5 +19,6 @@ public interface IHealthReportTransport
     /// </summary>
     /// <param name="report">The site health report to send.</param>
     /// <param name="cancellationToken">Cancels the in-flight send.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     Task SendAsync(SiteHealthReport report, CancellationToken cancellationToken);
 }

src/ZB.MOM.WW.ScadaBridge.HealthMonitoring/ServiceCollectionExtensions.cs

@@ -63,11 +63,11 @@ public static class ServiceCollectionExtensions
         services.AddHostedService(sp => sp.GetRequiredService<CentralHealthAggregator>());
         services.AddHostedService<CentralHealthReportLoop>();
 
-        // Task 10 (arch-review 04): the central backlog aggregate for the Audit Log
-        // KPI *history*. Only the central node runs the aggregator, so this seam is
-        // registered here; the AuditLogKpiSampleSource resolves it (optional ctor
-        // param) and records the real cross-site backlog instead of the append-only
-        // repository's hardwired zero. Sites leave it unregistered → snapshot fallback.
+        // The central backlog aggregate for the Audit Log KPI *history*. Only the
+        // central node runs the aggregator, so this seam is registered here; the
+        // AuditLogKpiSampleSource resolves it (optional ctor param) and records the
+        // real cross-site backlog instead of the append-only repository's hardwired
+        // zero. Sites leave it unregistered → snapshot fallback.
         services.AddSingleton<
             Commons.Interfaces.Kpi.IAuditBacklogProvider,
             Kpi.CentralHealthAuditBacklogProvider>();