docs: complete XML-doc coverage and strip internal tracking IDs from code comments

Resolve all CommentChecker findings across the gateway server, worker, tests,
and .NET client (314 -> 0 real issues): add missing <returns>/<summary>/<param>
on public and test members, convert Stream/interface overrides to <inheritdoc/>,
and remove internal task/issue tracking IDs (SEC-*, IPC-*, WRK-*, GWC-*, TST-*,
Client.Dotnet-*) from shipped code documentation while preserving the design
rationale prose. Shipped comments should not carry internal bookkeeping, and
complete XML docs keep the analyzer/TreatWarningsAsErrors gate and generated API
docs clean. The 6 remaining flags are heuristic false positives (MD5, UTC-4,
capacity-1, near-1601) left intact so real documentation is not corrupted.

Claude-Session: https://claude.ai/code/session_01DMXXvNuPekkkrTEyPNxEkW

src/ZB.MOM.WW.MxGateway.Worker/MxAccess/WnWrapAlarmConsumer.cs

@@ -301,14 +301,6 @@ public sealed class WnWrapAlarmConsumer : IMxAccessAlarmConsumer
     }
 
     /// <inheritdoc />
-    /// <remarks>
-    ///     STA-bound hosts drive polling by calling this from
-    ///     the thread that owns the COM object. The consumer deliberately
-    ///     owns no internal timer: a thread-pool timer would call the
-    ///     apartment-threaded COM object off its owning STA and can block
-    ///     indefinitely on cross-apartment marshaling when the STA is not
-    ///     pumping messages.
-    /// </remarks>
     public void PollOnce()
     {
         wwAlarmConsumerClass? com;