✨ Update usage grpc call

pkg/internal/services/attachments.go

@@ -238,3 +238,13 @@ func DeleteAttachment(item models.Attachment, txs ...*gorm.DB) error {
 
 	return nil
 }
+
+func CountAttachmentUsage(id []uint, delta int) (int64, error) {
+	if tx := database.C.Model(&models.Attachment{}).
+		Where("id IN ?", id).
+		Update("used_count", gorm.Expr("used_count + ?", delta)); tx.Error != nil {
+		return tx.RowsAffected, tx.Error
+	} else {
+		return tx.RowsAffected, nil
+	}
+}