Error handling changes

src/queries/downloads.rs

@@ -86,7 +86,8 @@ pub async fn retry_failed(db: &DatabaseConnection, id: i32) -> DbResult<()> {
     let mut active: ActiveModel = item.into();
     active.status = Set(DownloadStatus::Pending);
     active.error_message = Set(None);
-    active.retry_count = Set(active.retry_count.unwrap() + 1);
+    let current_retries = active.retry_count.take().unwrap_or(0);
+    active.retry_count = Set(current_retries + 1);
     active.updated_at = Set(Utc::now().naive_utc());
     active.update(db).await?;
     Ok(())