feat(scripts): realign Test Run with runtime API, add anonymous-object calls and instance binding

The Test Run sandbox and Monaco analysis modelled a script API that had
drifted from the site runtime's ScriptGlobals, so real scripts failed to
compile in Test Run. Realign both to the runtime surface
(Instance/Scripts/ExternalSystem/Attributes/Children/Parent) and drop the
duplicate ScriptHost stub so the two cannot diverge again.

- Script calls (Scripts.CallShared, Instance.CallScript, Route.To().Call)
  accept an anonymous object instead of a hand-built dictionary, via a
  shared ScriptArgs normalizer; existing dictionary calls still compile.
- Test Run can optionally bind to a deployed instance, so Instance/
  Attributes/CallScript route to it cross-site; adds site-side
  RouteToGetAttributes/RouteToSetAttributes handlers.
- Adds Test Run panels to the API method and template script editors.
- Fixes the TestDatabaseQuery seed script, which queried a table that
  never existed.

Also commits unrelated in-progress work already in the tree: the health
monitoring report loop, site streaming changes, and the Admin/Design
data-connection and SMTP page reorganization.

src/ScadaLink.Commons/Messages/Streaming/AlarmStateChanged.cs

@@ -7,7 +7,7 @@ public record AlarmStateChanged(
     string AlarmName,
     AlarmState State,
     int Priority,
-    DateTimeOffset Timestamp)
+    DateTimeOffset Timestamp) : ISiteStreamEvent
 {
     /// <summary>
     /// Severity level when <see cref="State"/> is <see cref="AlarmState.Active"/>.

src/ScadaLink.Commons/Messages/Streaming/AttributeValueChanged.cs

@@ -6,4 +6,4 @@ public record AttributeValueChanged(
     string AttributeName,
     object? Value,
     string Quality,
-    DateTimeOffset Timestamp);
+    DateTimeOffset Timestamp) : ISiteStreamEvent;

src/ScadaLink.Commons/Messages/Streaming/ISiteStreamEvent.cs

@@ -0,0 +1,10 @@
+namespace ScadaLink.Commons.Messages.Streaming;
+
+/// <summary>
+/// Marker interface for events published to the site-wide stream
+/// (attribute value changes and alarm state changes).
+/// </summary>
+public interface ISiteStreamEvent
+{
+    string InstanceUniqueName { get; }
+}