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

docker/README.md

@@ -185,12 +185,38 @@ curl -s http://localhost:9002/health/ready | python3 -m json.tool
 
 ### CLI Access
 
-Connect the ScadaLink CLI to the central cluster via host-mapped Akka remoting ports:
+Connect the ScadaLink CLI to the central cluster. With OrbStack, the contact point hostname must match the container's Akka `NodeHostname` config, so use the container name directly (OrbStack resolves container names via DNS):
 
 ```bash
 dotnet run --project src/ScadaLink.CLI -- \
-    --contact-points akka.tcp://scadalink@localhost:9011 \
-    --username admin --password password \
+    --contact-points akka.tcp://scadalink@scadalink-central-a:8081 \
+    --username multi-role --password password \
+    template list
+```
+
+> **Note:** The `multi-role` test user has Admin, Design, and Deployment roles. The `admin` user only has the Admin role and cannot perform design or deployment operations. See `infra/glauth/config.toml` for all test users and their group memberships.
+
+A recommended `~/.scadalink/config.json` for the Docker test environment:
+
+```json
+{
+  "contactPoints": ["akka.tcp://scadalink@scadalink-central-a:8081"],
+  "ldap": {
+    "server": "localhost",
+    "port": 3893,
+    "useTls": false,
+    "searchBase": "dc=scadalink,dc=local",
+    "serviceAccountDn": "cn=admin,dc=scadalink,dc=local",
+    "serviceAccountPassword": "password"
+  }
+}
+```
+
+With this config file in place, the contact points and LDAP settings are automatic:
+
+```bash
+dotnet run --project src/ScadaLink.CLI -- \
+    --username multi-role --password password \
     template list
 ```