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/Core/ZB.MOM.WW.OtOpcUa.Commons/Interfaces/IAdminOperationsClient.cs

@@ -9,5 +9,9 @@ namespace ZB.MOM.WW.OtOpcUa.Commons.Interfaces;
 /// </summary>
 public interface IAdminOperationsClient
 {
+    /// <summary>Starts a new deployment on the cluster-singleton admin operations actor.</summary>
+    /// <param name="createdBy">The user or system identifier triggering the deployment.</param>
+    /// <param name="ct">The cancellation token.</param>
+    /// <returns>A task representing the asynchronous operation containing the deployment start result.</returns>
     Task<StartDeploymentResult> StartDeploymentAsync(string createdBy, CancellationToken ct);
 }