docs: backfill XML documentation across 756 files

Adds <summary>, <param>, <typeparam>, and <inheritdoc/> tags to public
members surfaced by commentchecker — resolves 5,847 of 5,869 issues
(99.6%) across three /fixdocs passes.

src/Server/ZB.MOM.WW.OtOpcUa.Host/Health/AkkaClusterHealthCheck.cs

@@ -8,11 +8,20 @@ public sealed class AkkaClusterHealthCheck : IHealthCheck
 {
     private readonly ActorSystem _system;
 
+    /// <summary>
+    /// Initializes a new instance of the AkkaClusterHealthCheck class.
+    /// </summary>
+    /// <param name="system">The Akka actor system to check cluster health for.</param>
     public AkkaClusterHealthCheck(ActorSystem system)
     {
         _system = system;
     }
 
+    /// <summary>
+    /// Checks the health of the Akka cluster asynchronously.
+    /// </summary>
+    /// <param name="context">The health check context.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
     public Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken cancellationToken = default)
     {
         var cluster = Akka.Cluster.Cluster.Get(_system);