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.Communication/ServiceCollectionExtensions.cs

@@ -0,0 +1,30 @@
+using Microsoft.Extensions.DependencyInjection;
+using ZB.MOM.WW.ScadaBridge.Communication.Grpc;
+
+namespace ZB.MOM.WW.ScadaBridge.Communication;
+
+public static class ServiceCollectionExtensions
+{
+    /// <summary>Registers communication services including options, <see cref="CommunicationService"/>, gRPC client factory, and debug stream.</summary>
+    /// <param name="services">The DI service collection to register services into.</param>
+    public static IServiceCollection AddCommunication(this IServiceCollection services)
+    {
+        services.AddOptions<CommunicationOptions>()
+            .BindConfiguration("Communication");
+
+        services.AddSingleton<CommunicationService>();
+        services.AddSingleton<SiteStreamGrpcClientFactory>();
+        services.AddSingleton<DebugStreamService>();
+
+        return services;
+    }
+
+    /// <summary>Hook for registering additional DI services needed by communication actors; actor creation itself happens inside <c>AkkaHostedService</c>.</summary>
+    /// <param name="services">The DI service collection to register services into.</param>
+    public static IServiceCollection AddCommunicationActors(this IServiceCollection services)
+    {
+        // Actor registration happens in AkkaHostedService.RegisterCentralActors/RegisterSiteActors.
+        // This method is a hook for any additional DI registrations needed by the communication actors.
+        return services;
+    }
+}