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/AdminRoleLeaderHealthCheck.cs

@@ -13,11 +13,17 @@ public sealed class AdminRoleLeaderHealthCheck : IHealthCheck
 {
     private readonly IClusterRoleInfo _roleInfo;
 
+    /// <summary>Initializes a new instance of the AdminRoleLeaderHealthCheck class.</summary>
+    /// <param name="roleInfo">The cluster role information provider.</param>
     public AdminRoleLeaderHealthCheck(IClusterRoleInfo roleInfo)
     {
         _roleInfo = roleInfo;
     }
 
+    /// <summary>Checks the health status of the admin role leader.</summary>
+    /// <param name="context">The health check context.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>A task representing the health check operation.</returns>
     public Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken cancellationToken = default)
     {
         if (!_roleInfo.HasRole("admin"))