fallback support

Inspectron.Epson/PrintServer/JobSources/SignalRPrintJobSource.cs

@@ -34,7 +34,7 @@ public class SignalRPrintJobSource: IPrintJobSource
         _connection.Reconnected += OnReconnected;
         _connection.Closed += OnClosed;
 
-        _ = InitializeConnectionAsync();
+        
     }
 
     private async Task InitializeConnectionAsync()
@@ -106,6 +106,11 @@ public class SignalRPrintJobSource: IPrintJobSource
         });
     }
 
+    public Task StartAsync()
+    {
+        return InitializeConnectionAsync();
+    }
+
     public async Task<PrintJob> GetNextJobAsync(CancellationToken cancellationToken)
     {
         return await _printJobChannel.Reader.ReadAsync(cancellationToken);