fix: wire DCL connection state changes into ISiteHealthCollector

DataConnectionActor now calls UpdateConnectionHealth() on state
transitions (Connecting/Connected/Reconnecting) and UpdateTagResolution()
on connection establishment. DataConnectionManagerActor calls
RemoveConnection() on actor removal. Health reports now include
data connection statuses when instances are deployed with bindings.

src/ScadaLink.DataConnectionLayer/Actors/DataConnectionManagerActor.cs

@@ -2,6 +2,7 @@ using Akka.Actor;
 using Akka.Event;
 using ScadaLink.Commons.Interfaces.Protocol;
 using ScadaLink.Commons.Messages.DataConnection;
+using ScadaLink.HealthMonitoring;
 
 namespace ScadaLink.DataConnectionLayer.Actors;
 
@@ -15,14 +16,17 @@ public class DataConnectionManagerActor : ReceiveActor
     private readonly ILoggingAdapter _log = Context.GetLogger();
     private readonly IDataConnectionFactory _factory;
     private readonly DataConnectionOptions _options;
+    private readonly ISiteHealthCollector _healthCollector;
     private readonly Dictionary<string, IActorRef> _connectionActors = new();
 
     public DataConnectionManagerActor(
         IDataConnectionFactory factory,
-        DataConnectionOptions options)
+        DataConnectionOptions options,
+        ISiteHealthCollector healthCollector)
     {
         _factory = factory;
         _options = options;
+        _healthCollector = healthCollector;
 
         Receive<CreateConnectionCommand>(HandleCreateConnection);
         Receive<SubscribeTagsRequest>(HandleRoute);
@@ -44,7 +48,7 @@ public class DataConnectionManagerActor : ReceiveActor
         var adapter = _factory.Create(command.ProtocolType, command.ConnectionDetails);
 
         var props = Props.Create(() => new DataConnectionActor(
-            command.ConnectionName, adapter, _options, command.ConnectionDetails));
+            command.ConnectionName, adapter, _options, _healthCollector, command.ConnectionDetails));
 
         // Sanitize name for Akka actor path (replace spaces and invalid chars)
         var actorName = new string(command.ConnectionName
@@ -97,6 +101,7 @@ public class DataConnectionManagerActor : ReceiveActor
         {
             Context.Stop(actor);
             _connectionActors.Remove(command.ConnectionName);
+            _healthCollector.RemoveConnection(command.ConnectionName);
             _log.Info("Removed DataConnectionActor for {0}", command.ConnectionName);
         }
     }