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/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);