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.DataConnectionLayer/ServiceCollectionExtensions.cs

@@ -0,0 +1,36 @@
+using Microsoft.Extensions.DependencyInjection;
+
+namespace ZB.MOM.WW.ScadaBridge.DataConnectionLayer;
+
+/// <summary>
+/// DI registration extensions for the Data Connection Layer.
+/// </summary>
+public static class ServiceCollectionExtensions
+{
+    /// <summary>Registers Data Connection Layer options and core services.</summary>
+    /// <param name="services">The DI service collection to register into.</param>
+    /// <returns>The same <paramref name="services"/> instance for chaining.</returns>
+    public static IServiceCollection AddDataConnectionLayer(this IServiceCollection services)
+    {
+        services.AddOptions<DataConnectionOptions>()
+            .BindConfiguration("DataConnectionLayer");
+
+        services.AddOptions<OpcUaGlobalOptions>()
+            .BindConfiguration("OpcUa");
+
+        // WP-34: Register the factory for protocol extensibility
+        services.AddSingleton<IDataConnectionFactory, DataConnectionFactory>();
+
+        return services;
+    }
+
+    /// <summary>Placeholder for actor registration; Data Connection Layer actors are created inside the ActorSystem.</summary>
+    /// <param name="services">The DI service collection.</param>
+    /// <returns>The same <paramref name="services"/> instance for chaining.</returns>
+    public static IServiceCollection AddDataConnectionLayerActors(this IServiceCollection services)
+    {
+        // Actor registration happens in AkkaHostedService or SiteCommunicationActor setup.
+        // DataConnectionManagerActor and DataConnectionActor instances are created by the actor system.
+        return services;
+    }
+}