fix: utiliser /uploads/devis comme URL pour les PDFs de devis

src/Controller/DevisPdfController.php:
- Route changee de /devis/pdf/{id}/{type} vers /uploads/devis/{id}/{type}
  pour garder une URL coherente avec le dossier uploads

config/packages/vich_uploader.yaml:
- uri_prefix change de /devis/pdf vers /uploads/devis

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

config/packages/vich_uploader.yaml

@@ -7,6 +7,6 @@ vich_uploader:
             upload_destination: '%kernel.project_dir%/public/uploads/avatars'
             namer: Vich\UploaderBundle\Naming\SmartUniqueNamer
         devis_pdf:
-            uri_prefix: /devis/pdf
+            uri_prefix: /uploads/devis
             upload_destination: '%kernel.project_dir%/var/uploads/devis'
             namer: Vich\UploaderBundle\Naming\SmartUniqueNamer