docs(xml): fill missing XML doc comments + strip task-tracking refs across src (fixdocs)

Add missing <summary>/<param>/<returns>/<typeparam> tags and switch
interface implementations to <inheritdoc/> across 106 files; strip
project bookkeeping identifiers (Task NN, #05-TNN, PLAN-04, StoreAndForward-0NN)
from shipped code comments while preserving the descriptive rationale.
Comment-only: zero code-logic lines changed; solution builds 0/0.

Claude-Session: https://claude.ai/code/session_01MtdgwpEeCUn6cUA5f1LMPj

src/ZB.MOM.WW.ScadaBridge.ExternalSystemGateway/ErrorClassifier.cs

@@ -46,6 +46,9 @@ public static class ErrorClassifier
     /// (buffering caller-abandoned work into S&F would be wrong). Prefer this overload
     /// at call sites that hold the caller's token.
     /// </summary>
+    /// <param name="exception">The exception to classify.</param>
+    /// <param name="cancellationToken">The caller's cancellation token, used to distinguish caller-requested cancellation from a transient timeout.</param>
+    /// <returns><see langword="true"/> for connection/timeout exceptions and cancellations not requested by the caller's token; <see langword="false"/> otherwise.</returns>
     public static bool IsTransient(Exception exception, CancellationToken cancellationToken)
     {
         if (exception is OperationCanceledException && cancellationToken.IsCancellationRequested)