Improve PDF font handling; simplify report SQL fields

Enhanced PDFBurner to use a static FontProvider for better font support when rendering form field values. In ReportCreator, removed unused HEAD_TITLE and HEAD_SUBJECT fields from the SQL query and related mapping, streamlining report item loading.

EnvelopeGenerator.Jobs/Jobs/FinalizeDocument/PDFBurner.cs

@@ -7,6 +7,8 @@ using iText.Kernel.Pdf;
 using iText.Kernel.Pdf.Canvas;
 using iText.Layout;
 using iText.Layout.Element;
+using iText.Layout.Font;
+using iText.Layout.Properties;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Logging.Abstractions;
 using Newtonsoft.Json;
@@ -17,6 +19,7 @@ namespace EnvelopeGenerator.Jobs.FinalizeDocument;
 
 public class PDFBurner
 {
+    private static readonly FontProvider FontProvider = CreateFontProvider();
     private readonly ILogger<PDFBurner> _logger;
     private readonly PDFBurnerParams _pdfBurnerParams;
 
@@ -160,6 +163,14 @@ public class PDFBurner
         }
     }
 
+    private static FontProvider CreateFontProvider()
+    {
+        var provider = new FontProvider();
+        provider.AddStandardPdfFonts();
+        provider.AddSystemFonts();
+        return provider;
+    }
+
     private void AddFormFieldValue(PdfDocument pdf, Annotation annotation, string value)
     {
         var bounds = annotation.bbox.Select(ToInches).ToList();
@@ -170,6 +181,9 @@ public class PDFBurner
 
         var page = pdf.GetPage(annotation.pageIndex + 1);
         var canvas = new Canvas(new PdfCanvas(page), page.GetPageSize());
+        canvas.SetProperty(Property.FONT_PROVIDER, FontProvider);
+        canvas.SetProperty(Property.FONT, FontProvider.GetFontSet());
+
         var paragraph = new Paragraph(value)
             .SetFontSize(_pdfBurnerParams.FontSize)
             .SetFontColor(ColorConstants.BLACK)
@@ -185,7 +199,8 @@ public class PDFBurner
             paragraph.SetBold();
         }
 
-        canvas.ShowTextAligned(paragraph,
+        canvas.ShowTextAligned(
+            paragraph,
             x + (float)_pdfBurnerParams.TopMargin,
             y + (float)_pdfBurnerParams.YOffset,
             annotation.pageIndex + 1,