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.Host/Health/ClusterActivityEvaluator.cs

@@ -14,6 +14,9 @@ namespace ZB.MOM.WW.ScadaBridge.Host.Health;
 public static class ClusterActivityEvaluator
 {
     /// <summary>True when self is Up and no other Up member (in the role scope) is older.</summary>
+    /// <param name="cluster">The Akka cluster to evaluate.</param>
+    /// <param name="role">Optional role scope; when set, only members with this role are considered.</param>
+    /// <returns><c>true</c> when self is Up and the oldest Up member in the role scope.</returns>
     public static bool SelfIsOldest(Cluster cluster, string? role = null)
     {
         var self = cluster.SelfMember;
@@ -29,6 +32,9 @@ public static class ClusterActivityEvaluator
     }
 
     /// <summary>The oldest Up member in the role scope, or null while none is Up. Used for Primary/Standby labelling.</summary>
+    /// <param name="cluster">The Akka cluster to evaluate.</param>
+    /// <param name="role">Optional role scope; when set, only members with this role are considered.</param>
+    /// <returns>The oldest Up member in the role scope, or null when none is Up.</returns>
     public static Member? OldestUpMember(Cluster cluster, string? role = null)
     {
         Member? oldest = null;

src/ZB.MOM.WW.ScadaBridge.Host/Health/OldestNodeActiveHealthCheck.cs

@@ -20,7 +20,10 @@ public sealed class OldestNodeActiveHealthCheck : IHealthCheck
     /// <param name="system">The live cluster actor system.</param>
     public OldestNodeActiveHealthCheck(ActorSystem system) => _system = system;
 
-    /// <inheritdoc />
+    /// <summary>Reports Healthy only when this node is the oldest Up cluster member (the singleton host); otherwise reports Unhealthy.</summary>
+    /// <param name="context">The health check context (unused; the result depends only on cluster membership).</param>
+    /// <param name="ct">Cancellation token.</param>
+    /// <returns>A task that resolves to the health check result.</returns>
     public Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken ct = default)
     {
         var cluster = Akka.Cluster.Cluster.Get(_system);

src/ZB.MOM.WW.ScadaBridge.Host/Health/RequiredSingletonsHealthCheck.cs

@@ -94,7 +94,10 @@ public sealed class RequiredSingletonsHealthCheck : IHealthCheck
         _logger = logger ?? throw new ArgumentNullException(nameof(logger));
     }
 
-    /// <inheritdoc />
+    /// <summary>Evaluates whether all required cluster singletons are running and reports the aggregate health.</summary>
+    /// <param name="context">The health-check context supplied by the health-check middleware.</param>
+    /// <param name="cancellationToken">Token used to cancel the health evaluation.</param>
+    /// <returns>A task that resolves to a healthy result when every required singleton is present, otherwise an unhealthy result describing what is missing.</returns>
     public async Task<HealthCheckResult> CheckHealthAsync(
         HealthCheckContext context,
         CancellationToken cancellationToken = default)