Introduced a new `DocumentService` class to handle fetching
PDF document bytes from an API endpoint. The service uses
`HttpClient` for HTTP communication and `IOptions<ApiOptions>`
for accessing API configuration. Added the `GetDocumentAsync`
method to perform the HTTP GET request, handle responses, and
return the document bytes along with the HTTP status code.
Included necessary `using` directives and encapsulated the
service in the `EnvelopeGenerator.ReceiverUI.Services` namespace.
Introduced `InMemoryReportStorageWebExtension` to manage
reports in memory, enabling dynamic report storage and
retrieval. Updated `ReportViewer.razor` to conditionally
render the `DxReportViewer` component and initialize
reports asynchronously.
Configured dependency injection in `Program.cs` to register
`InMemoryReportStorageWebExtension` as a singleton and
integrated it with `CustomReportProvider`. Registered
`EnvelopeGenerator.ReceiverUI.PredefinedReports.Report` as
a trusted class for deserialization.
Enhanced `CustomReportProvider` to fetch reports from
memory or generate them dynamically using `ReportsFactory`.
Added necessary `using` directives and ensured proper
report lifecycle management.
