feat(BurnPdfCommandHandler): add logging and implement BurnInstantJSONAnnotsToPDF

- Added ILogger<BurnPdfCommandHandler> to log warnings during annotation processing
- Implemented BurnInstantJSONAnnotsToPDF method to handle instant JSON annotations
- Added AddInstantJSONAnnotationToPDF stub for future implementation
- Updated PDF burn flow to include error handling and logging

EnvelopeGenerator.Application/Pdf/BurnPdfCommand.cs

@@ -3,10 +3,10 @@ using EnvelopeGenerator.Application.Common.Configurations;
 using EnvelopeGenerator.Application.Exceptions;
 using EnvelopeGenerator.Domain.Constants;
 using EnvelopeGenerator.Domain.Entities;
-using EnvelopeGenerator.PdfEditor;
 using GdPicture14;
 using MediatR;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
 
 namespace EnvelopeGenerator.Application.Pdf;
 
@@ -31,17 +31,21 @@ public class BurnPdfCommandHandler : IRequestHandler<BurnPdfCommand>
 
     private readonly IRepository<Signature> _signRepo;
 
+    private readonly ILogger<BurnPdfCommandHandler> _logger;
+
     /// <summary>
     /// 
     /// </summary>
     /// <param name="pdfBurnerParams"></param>
     /// <param name="manager"></param>
     /// <param name="signRepo"></param>
-    public BurnPdfCommandHandler(PDFBurnerParams pdfBurnerParams, AnnotationManager manager, IRepository<Signature> signRepo)
+    /// <param name="logger"></param>
+    public BurnPdfCommandHandler(PDFBurnerParams pdfBurnerParams, AnnotationManager manager, IRepository<Signature> signRepo, ILogger<BurnPdfCommandHandler> logger)
     {
         _pdfBurnerParams = pdfBurnerParams;
         _manager = manager;
         _signRepo = signRepo;
+        _logger = logger;
     }
 
     /// <summary>
@@ -162,6 +166,52 @@ public class BurnPdfCommandHandler : IRequestHandler<BurnPdfCommand>
     /// <param name="pInstantJSONList"></param>
     /// <returns></returns>
     public byte[] BurnInstantJSONAnnotsToPDF(byte[] pSourceBuffer, List<string> pInstantJSONList)
+    {
+        GdPictureStatus oResult;
+
+        using var oSourceStream = new MemoryStream(pSourceBuffer);
+        // Open PDF
+        oResult = _manager.InitFromStream(oSourceStream);
+        if (oResult != GdPictureStatus.OK)
+        {
+            throw new BurnAnnotationException($"Could not open document for burning: [{oResult}]");
+        }
+
+        // Add annotation to PDF
+        foreach (var oJSON in pInstantJSONList)
+        {
+            try
+            {
+                AddInstantJSONAnnotationToPDF(oJSON);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning("Error in AddInstantJSONAnnotationToPDF - oJson: ");
+                _logger.LogWarning(oJSON);
+                throw new BurnAnnotationException("Adding Annotation failed", ex);
+            }
+        }
+
+        oResult = _manager.BurnAnnotationsToPage(RemoveInitialAnnots: true, VectorMode: true);
+        if (oResult != GdPictureStatus.OK)
+        {
+            throw new BurnAnnotationException($"Could not burn annotations to file: [{oResult}]");
+        }
+
+        // Save PDF
+        using var oNewStream = new MemoryStream();
+        oResult = _manager.SaveDocumentToPDF(oNewStream);
+        if (oResult != GdPictureStatus.OK)
+        {
+            throw new BurnAnnotationException($"Could not save document to stream: [{oResult}]");
+        }
+
+        _manager.Close();
+
+        return oNewStream.ToArray();
+    }
+
+    private void AddInstantJSONAnnotationToPDF(string pInstantJSON)
     {
         throw new NotImplementedException();
     }