Update text truncation logic to use rendered width

Replaced character-based truncation with pixel-accurate truncation based on rendered width in inches. Updated `TruncateText` in `PDFBurner.vb` to use `Graphics.MeasureString` for width calculation and introduced a binary search for efficient truncation. Renamed `egName` to `fieldEgName` for clarity.

Replaced `TextMaxLengths` with `TextMaxWidths` in `PDFBurnerParams.vb`, specifying maximum render widths in inches. Updated default values for `position`, `city`, and `date`. Revised XML documentation to reflect the new truncation logic.

EnvelopeGenerator.CommonServices/Jobs/FinalizeDocument/PDFBurnerParams.vb

@@ -20,15 +20,16 @@ Namespace Jobs.FinalizeDocument
         Public Property TruncationSuffix As String = ".."
 
         ''' <summary>
-        ''' Per-field maximum character count (including the TruncationSuffix).
-        ''' If a value exceeds the limit it is cut and TruncationSuffix is appended.
+        ''' Per-field maximum render width in inches.
+        ''' Text is measured using the configured Font/FontSize via Graphics.MeasureString (pixel-accurate).
+        ''' If the rendered width exceeds the limit, the text is cut and TruncationSuffix is appended.
         ''' Keys must match egName values used in PDFBurner (e.g. "name", "position", "city", "date").
         ''' Set a value to 0 to disable truncation for that field.
         ''' </summary>
-        Public Property TextMaxLengths As New Dictionary(Of String, Integer) From {
-            {"position", 20},
-            {"city", 20},
-            {"date", 28}
+        Public Property TextMaxWidths As New Dictionary(Of String, Single) From {
+            {"position", 1.25F},
+            {"city", 1.25F},
+            {"date", 2.0F}
         }
     End Class
 End Namespace