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/Grpc/ISiteStreamSubscriber.cs

@@ -0,0 +1,25 @@
+using Akka.Actor;
+
+namespace ZB.MOM.WW.ScadaBridge.Communication.Grpc;
+
+/// <summary>
+/// Abstraction over the site-side stream subscription mechanism.
+/// SiteStreamManager in the SiteRuntime project implements this interface;
+/// the gRPC server depends on it without referencing SiteRuntime directly.
+/// </summary>
+public interface ISiteStreamSubscriber
+{
+    /// <summary>
+    /// Subscribes an actor to receive filtered stream events for a specific instance.
+    /// </summary>
+    /// <param name="instanceName">The unique name of the instance whose events to subscribe to.</param>
+    /// <param name="subscriber">The actor reference that will receive stream event messages.</param>
+    /// <returns>A subscription ID that can be used for unsubscription.</returns>
+    string Subscribe(string instanceName, IActorRef subscriber);
+
+    /// <summary>
+    /// Removes all subscriptions for the given actor.
+    /// </summary>
+    /// <param name="subscriber">The actor reference whose subscriptions should be removed.</param>
+    void RemoveSubscriber(IActorRef subscriber);
+}