add: delete uploads and polls when user is deleted

crates/core/src/database/auth.rs

@@ -416,6 +416,16 @@ impl DataManager {
             remove_file(banner).unwrap();
         }
 
+        // delete uploads
+        for upload in self.get_uploads_by_owner_all(user.id).await? {
+            self.delete_upload(upload.id).await?;
+        }
+
+        // delete polls
+        for poll in self.get_polls_by_owner_all(user.id).await? {
+            self.delete_poll(poll.id, &user).await?;
+        }
+
         // ...
         Ok(())
     }