docs(xmldoc): fill missing XML docs + strip tracking-ID comments across src

Adds <summary>/<param>/<returns>/<inheritdoc> where missing and removes
project bookkeeping IDs (task/tracking refs) from shipped code comments,
so the docs read cleanly and CommentChecker is quiet except for known
false positives (PLC/protocol terms, event/IEqualityComparer inheritdoc).
Doc/comment-only; no logic changed; solution builds clean.

src/Server/ZB.MOM.WW.OtOpcUa.Security/Auth/AutoLoginAuthenticationHandler.cs

@@ -33,9 +33,14 @@ public sealed class AutoLoginAuthenticationHandler
         => _opts = disableLoginOptions.Value;
 
     /// <summary>No-op: auto-login writes no cookie, so an explicit sign-in has nothing to persist.</summary>
+    /// <param name="user">The principal that would be signed in.</param>
+    /// <param name="properties">Authentication properties that would be persisted.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public Task SignInAsync(ClaimsPrincipal user, AuthenticationProperties? properties) => Task.CompletedTask;
 
     /// <summary>No-op: there is no auth cookie to clear; the next request re-authenticates via this handler.</summary>
+    /// <param name="properties">Authentication properties that would be cleared.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public Task SignOutAsync(AuthenticationProperties? properties) => Task.CompletedTask;
 
     /// <inheritdoc />