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

src/ScadaLink.CentralUI/Components/Pages/Monitoring/EventLogs.razor

@@ -44,10 +44,14 @@
             <label class="form-label small">To</label>
             <input type="datetime-local" class="form-control form-control-sm" @bind="_filterTo" />
         </div>
-        <div class="col-md-2">
+        <div class="col-md-1">
             <label class="form-label small">Keyword</label>
             <input type="text" class="form-control form-control-sm" @bind="_filterKeyword" />
         </div>
+        <div class="col-md-2">
+            <label class="form-label small">Instance</label>
+            <input type="text" class="form-control form-control-sm" @bind="_filterInstanceName" placeholder="Instance name" />
+        </div>
         <div class="col-md-1 d-flex align-items-end">
             <button class="btn btn-primary btn-sm" @onclick="Search" disabled="@(string.IsNullOrEmpty(_selectedSiteId) || _searching)">
                 @if (_searching) { <span class="spinner-border spinner-border-sm"></span> }
@@ -111,6 +115,7 @@
     private DateTime? _filterFrom;
     private DateTime? _filterTo;
     private string? _filterKeyword;
+    private string? _filterInstanceName;
 
     private List<EventLogEntry>? _entries;
     private bool _hasMore;
@@ -146,7 +151,7 @@
                 To: _filterTo.HasValue ? new DateTimeOffset(_filterTo.Value, TimeSpan.Zero) : null,
                 EventType: string.IsNullOrWhiteSpace(_filterEventType) ? null : _filterEventType.Trim(),
                 Severity: string.IsNullOrWhiteSpace(_filterSeverity) ? null : _filterSeverity,
-                InstanceId: null,
+                InstanceId: string.IsNullOrWhiteSpace(_filterInstanceName) ? null : _filterInstanceName.Trim(),
                 KeywordFilter: string.IsNullOrWhiteSpace(_filterKeyword) ? null : _filterKeyword.Trim(),
                 ContinuationToken: _continuationToken,
                 PageSize: 50,