review(Driver.Historian.Wonderware): AtTime fails over on connection-class errors

Re-review at 7286d320. -014 (Medium): ReadAtTimeAsync didn't classify StartQuery failures,
so a connection-class failure left a dead connection, re-failed every timestamp, and returned
Success=true with all-Bad (no failover); now resets+fails over via a shared classifier + tests.
-015: refresh stale named-pipe comments to TCP (no wire change). -013 (silent cap truncation,
ties OpcUaServer-002/Core.Abstractions-009) deferred cross-module. NOTE: the SDK-touching tests
are net48 + native aahClientManaged and run only on Windows; macOS verifies build + the SDK-free
subset only.

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware/Backend/HistorianConfiguration.cs

@@ -6,7 +6,7 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Backend
     ///     Wonderware Historian SDK configuration. Populated from environment variables at
     ///     sidecar startup (see <c>Program.cs</c>): the supervisor (lmxopcua-side
     ///     <c>WonderwareHistorianClient</c>) spawns the sidecar with these env vars; UA
-    ///     translation lives on the client side of the named-pipe IPC, so this surface is
+    ///     translation lives on the client side of the TCP IPC, so this surface is
     ///     kept OPC-UA-free. The legacy v1 Galaxy.Host / Proxy host this lived in retired
     ///     in PR 7.2.
     /// </summary>