chore: migrate from npm to pnpm for package management across documentation and scripts

data/README.md

@@ -64,16 +64,16 @@ BACKUP_STORAGE_PATH="./data/backups"
 
 ```bash
 # Créer une sauvegarde manuelle
-npm run backup:create
+pnpm run backup:create
 
 # Lister les sauvegardes
-npm run backup:list
+pnpm run backup:list
 
 # Voir la configuration
-npm run backup:config
+pnpm run backup:config
 
 # Restaurer une sauvegarde (dev uniquement)
-npm run backup:restore filename.db.gz
+pnpm run backup:restore filename.db.gz
 ```
 
 ## ⚠️ Important