Rename FileNormalizer to DocumentNormalizer in OpenAI contract

This change renames the FileNormalizer class to DocumentNormalizer in the
OpenAI contract to better reflect its purpose of normalizing document files.

Changes:
- Rename FileNormalizer.php to DocumentNormalizer.php
- Update class name from FileNormalizer to DocumentNormalizer
- Update all references in OpenAiContract.php and test file
- Tests continue to pass, maintaining backward compatibility

Author: OskarStark

src/platform/src/Bridge/OpenAi/Contract/FileNormalizer.php renamed to src/platform/src/Bridge/OpenAi/Contract/DocumentNormalizer.php

@@ -19,7 +19,7 @@
 /**
  * @author Guillermo Lengemann <guillermo.lengemann@gmail.com>
  */
-class FileNormalizer extends ModelContractNormalizer
+class DocumentNormalizer extends ModelContractNormalizer
 {
     /**
      * @param File $data

src/platform/src/Bridge/OpenAi/Contract/OpenAiContract.php

@@ -24,7 +24,7 @@ public static function create(NormalizerInterface ...$normalizer): Contract
     {
         return parent::create(
             new AudioNormalizer(),
-            new FileNormalizer(),
+            new DocumentNormalizer(),
             ...$normalizer
         );
     }

src/platform/tests/Bridge/OpenAi/Contract/DocumentNormalizerTest.php

@@ -15,21 +15,21 @@
 use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\Attributes\Medium;
 use PHPUnit\Framework\TestCase;
-use Symfony\AI\Platform\Bridge\OpenAi\Contract\FileNormalizer;
+use Symfony\AI\Platform\Bridge\OpenAi\Contract\DocumentNormalizer;
 use Symfony\AI\Platform\Bridge\OpenAi\Gpt;
 use Symfony\AI\Platform\Contract;
 use Symfony\AI\Platform\Contract\Normalizer\Message\MessageBagNormalizer;
 use Symfony\AI\Platform\Message\Content\Document;
 use Symfony\AI\Platform\Message\Content\File;
 
 #[Medium]
-#[CoversClass(FileNormalizer::class)]
+#[CoversClass(DocumentNormalizer::class)]
 #[CoversClass(MessageBagNormalizer::class)]
 final class DocumentNormalizerTest extends TestCase
 {
     public function testSupportsNormalization()
     {
-        $normalizer = new FileNormalizer();
+        $normalizer = new DocumentNormalizer();
 
         $this->assertTrue($normalizer->supportsNormalization(new Document('some content', 'application/pdf'), context: [
             Contract::CONTEXT_MODEL => new Gpt(),
@@ -42,7 +42,7 @@ public function testSupportsNormalization()
 
     public function testGetSupportedTypes()
     {
-        $normalizer = new FileNormalizer();
+        $normalizer = new DocumentNormalizer();
 
         $expected = [
             File::class => true,
@@ -54,7 +54,7 @@ public function testGetSupportedTypes()
     #[DataProvider('normalizeDataProvider')]
     public function testNormalize(File $file, array $expected)
     {
-        $normalizer = new FileNormalizer();
+        $normalizer = new DocumentNormalizer();
 
         $normalized = $normalizer->normalize($file);