refactor(historian-gateway): retire Wonderware historian projects (gateway is sole backend)

The HistorianGateway driver is now the sole historian read/write+alarm backend, so the
Wonderware sidecar projects are dead code. Removes the 5 Wonderware projects (driver,
.Client, .Client.Contracts, + their 2 test projects) from the solution and tree, and fully
retires the vestigial 'Historian.Wonderware' driver type (UI/probe-only; it had no driver
factory): the Host probe registration, the AdminUI driver-config surface (driver page,
tag-config editor/model/validator entry, address picker/builder, driver-type catalog +
dropdown + edit-router entries), and their tests. Prunes the now-unused Wonderware
connection fields (Host/Port/UseTls/ServerCertThumbprint/SharedSecret) from
AlarmHistorianOptions (keeping Enabled + the SQLite store-and-forward knobs) and refreshes
the stale XML docs that named Wonderware as the production backend.

Claude-Session: https://claude.ai/code/session_012SDSQ3AcaXqPcBtDESBRii

tests/Server/ZB.MOM.WW.OtOpcUa.AdminUI.Tests/DriverPageJsonConverterTests.cs

@@ -62,7 +62,7 @@ public sealed class DriverPageJsonConverterTests
         var allDriverPages = typeof(S7DriverPage).Assembly.GetTypes()
             .Where(t => t.Name.EndsWith("DriverPage", StringComparison.Ordinal) && !t.IsAbstract)
             .ToList();
-        allDriverPages.Count.ShouldBeGreaterThanOrEqualTo(9, "reflection should discover the full driver-page fleet");
+        allDriverPages.Count.ShouldBeGreaterThanOrEqualTo(8, "reflection should discover the full driver-page fleet");
         DriverPageTypes.Count.ShouldBe(allDriverPages.Count,
             "every *DriverPage must declare a _jsonOpts config serializer so the string-enum converter guard covers it");
     }