Function add_file_for_cleanup 

pub async fn add_file_for_cleanup(
    transaction: &mut Transaction<'_, Postgres>,
    file_path: &str,
    file_size: i64,
) -> Result<(), Error>

Adds a file to the temporary_files table for cleanup.

Files added to temporary_files will be automatically deleted by the cleanup process after the expiration time. The default expiration is 1 hour from now.