feat: add JoeAppEngine OPC UA nodes, fix DCL auto-reconnect and quality push

- Add JoeAppEngine folder to OPC UA nodes.json (BTCS, AlarmCntsBySeverity, Scheduler/ScanTime)
- Fix DataConnectionActor: capture Self in PreStart for use from non-actor threads,
  preventing Self.Tell failure in Disconnected event handler
- Implement InstanceActor.HandleConnectionQualityChanged to mark attributes Bad on disconnect
- Fix LmxFakeProxy TagMapper to serialize arrays as JSON instead of "System.Int32[]"
- Allow DataType and DataSourceReference updates in TemplateService.UpdateAttributeAsync
- Update test_infra_opcua.md with JoeAppEngine documentation

tests/ScadaLink.DataConnectionLayer.Tests/LmxProxyDataConnectionTests.cs

@@ -17,7 +17,7 @@ public class LmxProxyDataConnectionTests
     {
         _mockClient = Substitute.For<ILmxProxyClient>();
         _mockFactory = Substitute.For<ILmxProxyClientFactory>();
-        _mockFactory.Create(Arg.Any<string>(), Arg.Any<int>(), Arg.Any<string?>()).Returns(_mockClient);
+        _mockFactory.Create(Arg.Any<string>(), Arg.Any<int>(), Arg.Any<string?>(), Arg.Any<int>(), Arg.Any<bool>()).Returns(_mockClient);
         _adapter = new LmxProxyDataConnection(_mockFactory, NullLogger<LmxProxyDataConnection>.Instance);
     }
 
@@ -41,7 +41,7 @@ public class LmxProxyDataConnectionTests
         });
 
         Assert.Equal(ConnectionHealth.Connected, _adapter.Status);
-        _mockFactory.Received(1).Create("myhost", 5001, null);
+        _mockFactory.Received(1).Create("myhost", 5001, null, 0, false);
         await _mockClient.Received(1).ConnectAsync(Arg.Any<CancellationToken>());
     }
 
@@ -57,7 +57,7 @@ public class LmxProxyDataConnectionTests
             ["ApiKey"] = "my-secret-key"
         });
 
-        _mockFactory.Received(1).Create("server", 50051, "my-secret-key");
+        _mockFactory.Received(1).Create("server", 50051, "my-secret-key", 0, false);
     }
 
     [Fact]
@@ -67,7 +67,7 @@ public class LmxProxyDataConnectionTests
 
         await _adapter.ConnectAsync(new Dictionary<string, string>());
 
-        _mockFactory.Received(1).Create("localhost", 50051, null);
+        _mockFactory.Received(1).Create("localhost", 50051, null, 0, false);
     }
 
     [Fact]
@@ -201,7 +201,7 @@ public class LmxProxyDataConnectionTests
     {
         await ConnectAdapter();
         var mockSub = Substitute.For<ILmxSubscription>();
-        _mockClient.SubscribeAsync(Arg.Any<IEnumerable<string>>(), Arg.Any<Action<string, LmxVtq>>(), Arg.Any<CancellationToken>())
+        _mockClient.SubscribeAsync(Arg.Any<IEnumerable<string>>(), Arg.Any<Action<string, LmxVtq>>(), Arg.Any<Action?>(), Arg.Any<CancellationToken>())
             .Returns(mockSub);
 
         var subId = await _adapter.SubscribeAsync("Tag1", (_, _) => { });
@@ -209,7 +209,7 @@ public class LmxProxyDataConnectionTests
         Assert.NotNull(subId);
         Assert.NotEmpty(subId);
         await _mockClient.Received(1).SubscribeAsync(
-            Arg.Any<IEnumerable<string>>(), Arg.Any<Action<string, LmxVtq>>(), Arg.Any<CancellationToken>());
+            Arg.Any<IEnumerable<string>>(), Arg.Any<Action<string, LmxVtq>>(), Arg.Any<Action?>(), Arg.Any<CancellationToken>());
     }
 
     [Fact]
@@ -217,7 +217,7 @@ public class LmxProxyDataConnectionTests
     {
         await ConnectAdapter();
         var mockSub = Substitute.For<ILmxSubscription>();
-        _mockClient.SubscribeAsync(Arg.Any<IEnumerable<string>>(), Arg.Any<Action<string, LmxVtq>>(), Arg.Any<CancellationToken>())
+        _mockClient.SubscribeAsync(Arg.Any<IEnumerable<string>>(), Arg.Any<Action<string, LmxVtq>>(), Arg.Any<Action?>(), Arg.Any<CancellationToken>())
             .Returns(mockSub);
 
         var subId = await _adapter.SubscribeAsync("Tag1", (_, _) => { });
@@ -240,7 +240,7 @@ public class LmxProxyDataConnectionTests
     {
         await ConnectAdapter();
         var mockSub = Substitute.For<ILmxSubscription>();
-        _mockClient.SubscribeAsync(Arg.Any<IEnumerable<string>>(), Arg.Any<Action<string, LmxVtq>>(), Arg.Any<CancellationToken>())
+        _mockClient.SubscribeAsync(Arg.Any<IEnumerable<string>>(), Arg.Any<Action<string, LmxVtq>>(), Arg.Any<Action?>(), Arg.Any<CancellationToken>())
             .Returns(mockSub);
         await _adapter.SubscribeAsync("Tag1", (_, _) => { });
 
@@ -277,4 +277,46 @@ public class LmxProxyDataConnectionTests
         await Assert.ThrowsAsync<InvalidOperationException>(() =>
             _adapter.SubscribeAsync("tag1", (_, _) => { }));
     }
+
+    // --- Configuration Parsing ---
+
+    [Fact]
+    public async Task Connect_ParsesSamplingInterval()
+    {
+        _mockClient.IsConnected.Returns(true);
+
+        await _adapter.ConnectAsync(new Dictionary<string, string>
+        {
+            ["Host"] = "server",
+            ["Port"] = "50051",
+            ["SamplingIntervalMs"] = "500"
+        });
+
+        _mockFactory.Received(1).Create("server", 50051, null, 500, false);
+    }
+
+    [Fact]
+    public async Task Connect_ParsesUseTls()
+    {
+        _mockClient.IsConnected.Returns(true);
+
+        await _adapter.ConnectAsync(new Dictionary<string, string>
+        {
+            ["Host"] = "server",
+            ["Port"] = "50051",
+            ["UseTls"] = "true"
+        });
+
+        _mockFactory.Received(1).Create("server", 50051, null, 0, true);
+    }
+
+    [Fact]
+    public async Task Connect_DefaultsSamplingAndTls()
+    {
+        _mockClient.IsConnected.Returns(true);
+
+        await _adapter.ConnectAsync(new Dictionary<string, string>());
+
+        _mockFactory.Received(1).Create("localhost", 50051, null, 0, false);
+    }
 }