feature #620 [Demo] Leverage Vectorizer in QueryCommand (OskarStark)

This PR was squashed before being merged into the main branch.

Discussion
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[Demo] Leverage `Vectorizer` in `QueryCommand`

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Docs?         | no
| Issues        | Replaces #619
| License       | MIT

Replace direct platform usage with `VectorizerInterface` injection using the `#[Autowire]` attribute for cleaner dependency management and better separation of concerns.

Commits
-------

981ee06 [Demo] Leverage `Vectorizer` in `QueryCommand`

Author: OskarStark

demo/src/Blog/Command/QueryCommand.php

@@ -12,18 +12,19 @@
 namespace App\Blog\Command;
 
 use Codewithkyrian\ChromaDB\Client;
-use Symfony\AI\Platform\Bridge\OpenAi\Embeddings;
-use Symfony\AI\Platform\PlatformInterface;
+use Symfony\AI\Store\Document\VectorizerInterface;
 use Symfony\Component\Console\Attribute\AsCommand;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
 
 #[AsCommand('app:blog:query', description: 'Test command for querying the blog collection in Chroma DB.')]
-final class QueryCommand
+final readonly class QueryCommand
 {
     public function __construct(
-        private readonly Client $chromaClient,
-        private readonly PlatformInterface $platform,
+        private Client $chromaClient,
+        #[Autowire(service: 'ai.vectorizer.openai')]
+        private VectorizerInterface $vectorizer,
     ) {
     }
 
@@ -44,9 +45,9 @@ public function __invoke(SymfonyStyle $io): int
         $io->comment(\sprintf('Converting "%s" to vector & searching in Chroma DB ...', $search));
         $io->comment('Results are limited to 4 most similar documents.');
 
-        $platformResponse = $this->platform->invoke(new Embeddings(Embeddings::TEXT_3_SMALL), $search);
+        $vector = $this->vectorizer->vectorize($search);
         $queryResponse = $collection->query(
-            queryEmbeddings: [$platformResponse->asVectors()[0]->getData()],
+            queryEmbeddings: [$vector->getData()],
             nResults: 4,
         );