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.CentralUI/wwwroot/css/site.css

@@ -4,10 +4,23 @@
 .sidebar {
     min-width: 220px;
     max-width: 220px;
-    min-height: 100vh;
+    height: 100vh;
     background-color: var(--bs-dark);
 }
 
+/* Keep the sidebar pinned to the viewport on lg+ so it stays visible even
+   when the main content scrolls past 100vh. The wrapper is the flex child
+   of MainLayout; align-self prevents the flex row from stretching it. */
+@media (min-width: 992px) {
+    #sidebar-collapse {
+        position: sticky;
+        top: 0;
+        height: 100vh;
+        align-self: flex-start;
+        z-index: 1020;
+    }
+}
+
 .sidebar .nav-link {
     color: var(--bs-gray-500);
     padding: 0.4rem 1rem;
@@ -51,7 +64,7 @@
     .sidebar {
         min-width: 100%;
         max-width: 100%;
-        min-height: auto;
+        height: auto;
     }
 }