test(integration): multi-cluster deploy scopes drivers per node

tests/Server/ZB.MOM.WW.OtOpcUa.Host.IntegrationTests/TwoNodeClusterHarness.cs

@@ -90,6 +90,23 @@ public sealed class TwoNodeClusterHarness : IAsyncDisposable
     /// <summary>Gets the Akka ActorSystem for node B.</summary>
     public ActorSystem NodeBSystem => NodeB.Services.GetRequiredService<ActorSystem>();
 
+    /// <summary>
+    /// The <c>host:port</c> identity each node's <c>DriverHostActor</c> / <c>NodeDeploymentState</c>
+    /// row uses, derived the same way <c>ClusterRoleInfo</c> derives <c>LocalNode</c> from
+    /// <c>Cluster:PublicHostname</c> + <c>Cluster:Port</c>. Seed a <c>ClusterNode.NodeId</c> with this
+    /// value to bind a node to a logical ClusterId for multi-cluster scoping tests.
+    /// </summary>
+    public string NodeANodeId => $"{LoopbackHost}:{NodeAAkkaPort}";
+
+    /// <inheritdoc cref="NodeANodeId"/>
+    public string NodeBNodeId => $"{LoopbackHost}:{NodeBAkkaPort}";
+
+    /// <summary>Opens a new <see cref="OtOpcUaConfigDbContext"/> over the shared ConfigDb (the same
+    /// store both nodes read) so a test can seed clusters/nodes/drivers before triggering a deploy.</summary>
+    /// <returns>A new DbContext the caller is responsible for disposing.</returns>
+    public Task<OtOpcUaConfigDbContext> CreateConfigDbContextAsync()
+        => NodeA.Services.GetRequiredService<IDbContextFactory<OtOpcUaConfigDbContext>>().CreateDbContextAsync();
+
     /// <summary>Boots both nodes and waits up to <paramref name="formationTimeout"/> for cluster convergence.</summary>
     /// <param name="formationTimeout">Maximum time to wait for cluster formation; defaults to 20 seconds if not provided.</param>
     public static async Task<TwoNodeClusterHarness> StartAsync(TimeSpan? formationTimeout = null)