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/HealthEndpoints.cs

@@ -13,6 +13,7 @@ public static class HealthEndpoints
     /// probes. Mirrors ScadaLink's three-tier pattern: <c>ready</c> = boot ok; <c>active</c> =
     /// fully serving traffic; <c>healthz</c> = bare process liveness.
     /// </summary>
+    /// <param name="services">The service collection to register health checks with.</param>
     public static IServiceCollection AddOtOpcUaHealth(this IServiceCollection services)
     {
         services.AddHealthChecks()
@@ -22,6 +23,8 @@ public static class HealthEndpoints
         return services;
     }
 
+    /// <summary>Maps the OtOpcUa health check endpoints to the route builder.</summary>
+    /// <param name="app">The endpoint route builder.</param>
     public static IEndpointRouteBuilder MapOtOpcUaHealth(this IEndpointRouteBuilder app)
     {
         // AllowAnonymous on all three — Traefik / k8s liveness probes / load-balancers