Add condition to bypass document fetching logic

Updated the `OnInitializedAsync` method in `ReportViewer.razor`
to include a check for `AppOptions.Value.ForceToUseFakeDocument`.
This ensures that the application can bypass fetching the
actual document when the configuration option is enabled.

EnvelopeGenerator.ReceiverUI/Pages/ReportViewer.razor

@@ -176,7 +176,7 @@
 
     protected override async Task OnInitializedAsync() {
 
-        if (!string.IsNullOrWhiteSpace(EnvelopeKey)) {
+        if (!AppOptions.Value.ForceToUseFakeDocument && !string.IsNullOrWhiteSpace(EnvelopeKey)) {
             (PdfBytes, _) = await DocumentService.GetDocumentAsync(EnvelopeKey);
             return;
         }