refactor(BurnPdfCommand): add extension methods for ISender

- Introduce BurnPdfCommandExtensions to simplify sending BurnPdfCommand via ISender
- Enables calling `sender.BurnPdf(envelopeId, cancel)` or `sender.BurnPdf(envelopeUuid, cancel)`
- No changes to the underlying PDF burning logic in BurnPdfCommandHandler

EnvelopeGenerator.Finalizer/Job/FinishEnvelopeJob.cs

@@ -11,14 +11,11 @@ namespace EnvelopeGenerator.Finalizer.Job
     {
         private readonly ILogger<FinishEnvelopeJob> _logger;
 
-        private readonly GdPictureOptions _gdPictureOptions;
-
         private readonly IMediator _mediator;
 
-        public FinishEnvelopeJob(ILogger<FinishEnvelopeJob> logger, IOptions<GdPictureOptions> gdPictureOptions, IMediator mediator)
+        public FinishEnvelopeJob(ILogger<FinishEnvelopeJob> logger, IMediator mediator)
         {
             _logger = logger;
-            _gdPictureOptions = gdPictureOptions.Value;
             _mediator = mediator;
         }
 
@@ -28,7 +25,7 @@ namespace EnvelopeGenerator.Finalizer.Job
 
             var envelopes = await _mediator.Send(new ReadEnvelopeQuery()
             {
-                Status = new() { Include = [EnvelopeStatus.EnvelopeCompletelySigned] },
+                Status = new() { Include = [ EnvelopeStatus.EnvelopeCompletelySigned ] },
                 HasDocResult = false
             }, cancel);