mejoras

app/Http/Services/PdfProcessor.php

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+<?php
+
+namespace App\Services;
+
+use Spatie\PdfToText\Pdf;
+use PDFLib;
+
+class PdfProcessor
+{
+    public function extractAnnotations($path)
+    {
+        $text = (new Pdf())->setPdf($path)->text();
+        // Analizar texto para detectar anotaciones
+        return $this->parseAnnotations($text);
+    }
+
+    public function embedAnnotations($originalPdf, $annotations)
+    {
+        $pdf = new PDFLib();
+        $pdf->begin_document('', '');
+        
+        foreach($annotations as $annotation) {
+            $this->addAnnotationToPdf($pdf, $annotation);
+        }
+        
+        return $pdf->get_buffer();
+    }
+}