refactor: rename ScadaLink → ZB.MOM.WW.ScadaBridge (code + projects + namespaces)

Solution + 23 src projects + 26 test projects renamed; folders, csproj,
namespaces, and ScadaLinkDbContext/ScadaBridgeDbContext class updated.
ActorSystem "scadalink" → "scadabridge", Akka seed-node URLs migrated.
SQL roles/logins, LDAP domains, CLI command name, and CLI config dir
(~/.scadalink → ~/.scadabridge) also renamed.

Build green; 5 Host.Tests fail awaiting SQL login rename in next commit.
Pre-existing StaleTagMonitor timing flakes unchanged.

Rename script committed at tools/rename-to-scadabridge.sh.

src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Shared/TimestampDisplay.razor

@@ -0,0 +1,20 @@
+@* Displays a UTC DateTimeOffset formatted for display. Tooltip shows UTC value.
+   A null Value renders as a plain "never" placeholder — used for timestamps that
+   have not happened yet (e.g. a heartbeat-only site with no full report). *@
+
+@if (Value is { } value)
+{
+    <span title="@value.UtcDateTime.ToString("yyyy-MM-dd HH:mm:ss") UTC">@value.LocalDateTime.ToString(Format)</span>
+}
+else
+{
+    <span class="text-muted">@NullText</span>
+}
+
+@code {
+    [Parameter, EditorRequired] public DateTimeOffset? Value { get; set; }
+    [Parameter] public string Format { get; set; } = "yyyy-MM-dd HH:mm:ss";
+
+    /// <summary>Text shown when <see cref="Value"/> is null.</summary>
+    [Parameter] public string NullText { get; set; } = "never";
+}