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.SiteCallAudit/ServiceCollectionExtensions.cs

@@ -0,0 +1,41 @@
+using Microsoft.Extensions.DependencyInjection;
+
+namespace ZB.MOM.WW.ScadaBridge.SiteCallAudit;
+
+/// <summary>
+/// Composition root for the Site Call Audit (#22) component.
+/// </summary>
+/// <remarks>
+/// <para>
+/// Binds <see cref="SiteCallAuditOptions"/> (stuck-call detection + KPI
+/// windowing for the read-side query/KPI handlers). The reconciliation puller
+/// and central→site Retry/Discard relay are still deferred to later follow-ups.
+/// </para>
+/// <para>
+/// The repository (<c>ISiteCallAuditRepository</c>) is registered by
+/// <c>ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.ServiceCollectionExtensions.AddConfigurationDatabase</c>,
+/// so callers (the Host on the central node) must also call that. The actor's
+/// <c>Props</c> are wired up in Host registration.
+/// </para>
+/// </remarks>
+public static class ServiceCollectionExtensions
+{
+    /// <summary>Configuration section bound to <see cref="SiteCallAuditOptions"/>.</summary>
+    public const string OptionsSection = "ScadaBridge:SiteCallAudit";
+
+    /// <summary>
+    /// Registers Site Call Audit (#22) services: the <see cref="SiteCallAuditOptions"/>
+    /// binding consumed by the actor's read-side KPI/query handlers. The actor's
+    /// <c>Props</c> are still constructed inline in Host wiring.
+    /// </summary>
+    /// <param name="services">The service collection to register into.</param>
+    public static IServiceCollection AddSiteCallAudit(this IServiceCollection services)
+    {
+        ArgumentNullException.ThrowIfNull(services);
+
+        services.AddOptions<SiteCallAuditOptions>()
+            .BindConfiguration(OptionsSection);
+
+        return services;
+    }
+}