✨ feat(EcheanceEventSusbriber): Génère et enregistre le PDF d'échéance.

⚙️ chore(vich_uploader.yaml): Ajoute la configuration pour l'upload des échéances.
✅ feat(CustomerSplit): Ajoute les champs pour gérer l'upload du fichier d'échéance.

config/packages/vich_uploader.yaml

@@ -64,6 +64,13 @@ vich_uploader:
             inject_on_load: false
             delete_on_update: true
             delete_on_remove: true
+        echeance:
+            uri_prefix: /storage/echeance
+            upload_destination: '%kernel.project_dir%/public/storage/echeance'
+            namer: Vich\UploaderBundle\Naming\SmartUniqueNamer # Replaced namer
+            inject_on_load: false
+            delete_on_update: true
+            delete_on_remove: true
     #mappings:
     #    products:
     #        uri_prefix: /images/products