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/Client/ZB.MOM.WW.OtOpcUa.Client.Shared/Adapters/DefaultSessionFactory.cs

@@ -11,6 +11,14 @@ internal sealed class DefaultSessionFactory : ISessionFactory
 {
     private static readonly ILogger Logger = Log.ForContext<DefaultSessionFactory>();
 
+    /// <summary>Creates a new OPC UA session.</summary>
+    /// <param name="config">The OPC UA application configuration.</param>
+    /// <param name="endpoint">The endpoint description to connect to.</param>
+    /// <param name="sessionName">The name for the session.</param>
+    /// <param name="sessionTimeoutMs">The session timeout in milliseconds.</param>
+    /// <param name="identity">The user identity for the session.</param>
+    /// <param name="ct">The cancellation token.</param>
+    /// <returns>An adapter wrapping the created session.</returns>
     public async Task<ISessionAdapter> CreateSessionAsync(
         ApplicationConfiguration config,
         EndpointDescription endpoint,