fix: ensure pdf annotations are preserved when sanitizing upload

src/Service/Pdf/Sanitizer.php

@@ -22,7 +22,9 @@ class Sanitizer
         $filesystem = new Filesystem();
 
         if (true === $backup) {
-            $filesystem->copy($inputFilepath, $inputFilepath.'.bak');
+            $parts = pathinfo($inputFilepath);
+            $backupFilename = sprintf('%s/%s.orig.%s', $parts['dirname'], $parts['filename'], $parts['extension']);
+            $filesystem->copy($inputFilepath, $backupFilename);
         }
 
         $tempFilename = sha1($inputFilepath);
@@ -57,6 +59,7 @@ class Sanitizer
             '-dNOPAUSE',
             '-dQUIET',
             '-dBATCH',
+            '-dPreserveAnnots=false',
             '-sDEVICE=pdfwrite',
             '-dCompatibilityLevel=1.4',
             '-sOutputFile='.$outputFilepath,