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

src/Core/ZB.MOM.WW.OtOpcUa.Core.AlarmHistorian/IAlarmHistorianSink.cs

@@ -1,10 +1,9 @@
 namespace ZB.MOM.WW.OtOpcUa.Core.AlarmHistorian;
 
 /// <summary>
-///     The historian sink contract — where qualifying alarm events land. Phase 7 plan
-///     decision #17: ingestion routes through the Wonderware historian sidecar
-///     (<c>WonderwareHistorianClient</c>), which owns the <c>aahClientManaged</c> DLLs
-///     and 32-bit constraints. Tests use an in-memory fake; production uses
+///     The historian sink contract — where qualifying alarm events land. Ingestion routes
+///     through the HistorianGateway alarm writer (the gateway's <c>SendEvent</c> gRPC path)
+///     behind the durable store-and-forward queue. Tests use an in-memory fake; production uses
 ///     <see cref="SqliteStoreAndForwardSink"/>.
 /// </summary>
 /// <remarks>
@@ -80,7 +79,7 @@ public enum HistorianDrainState
     BackingOff,
 }
 
-/// <summary>Returned by the Wonderware historian sidecar per event — drain worker uses this to decide retry cadence.</summary>
+/// <summary>Returned by the historian alarm writer per event — drain worker uses this to decide retry cadence.</summary>
 public enum HistorianWriteOutcome
 {
     /// <summary>Successfully persisted to the historian. Remove from queue.</summary>
@@ -91,7 +90,7 @@ public enum HistorianWriteOutcome
     PermanentFail,
 }
 
-/// <summary>What the drain worker delegates writes to — production is <c>WonderwareHistorianClient</c> (the Wonderware historian sidecar).</summary>
+/// <summary>What the drain worker delegates writes to — production is the HistorianGateway alarm writer (the gateway's <c>SendEvent</c> gRPC path).</summary>
 public interface IAlarmHistorianWriter
 {
     /// <summary>Push a batch of events to the historian. Returns one outcome per event, same order.</summary>