review(AdminUI): fix null-TagConfig crash, CTS leak, unencoded historian tag

Review at HEAD 7286d320. AdminUI-002: IsValidJson null/blank -> friendly error (was
ArgumentNullException). AdminUI-003: DriverStatusPanel Reconnect/Restart dispose CTS (build-
verified, live /run deferred). AdminUI-005: HistorianWonderware picker URL-encodes tag name.
AdminUI-008: Format round-trip test. 001 (script-page authz) + 004 (hub [Authorize]) left
Open as cross-cutting w/ Host/Security.

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Shared/Drivers/Pickers/HistorianWonderwareAddressBuilder.cs

@@ -8,5 +8,8 @@ namespace ZB.MOM.WW.OtOpcUa.AdminUI.Components.Shared.Drivers.Pickers;
 public static class HistorianWonderwareAddressBuilder
 {
     public static string Build(string tagName, string mode, int interval)
-        => $"{tagName}?mode={mode}&interval={interval}";
+        // Percent-encode the tag name so a name carrying query-reserved characters (? & # =) can't
+        // corrupt the produced query string (AdminUI-005). Mode is a fixed enum-style token, so it
+        // needs no encoding.
+        => $"{Uri.EscapeDataString(tagName)}?mode={mode}&interval={interval}";
 }