const MIGRATION_017: &str = r#"
-- Resolved download source URL and on-disk target directory, captured when the
-- download is enqueued. Nullable: pre-existing rows and rows enqueued without a
-- URL simply won't be auto-started by the pump.
ALTER TABLE downloads ADD COLUMN stream_url TEXT;
ALTER TABLE downloads ADD COLUMN target_dir TEXT;
"#;Expand description
Migration to persist the resolved stream URL and target directory on each download row. This lets the backend queue pump start a pending download by itself (replaying the stored URL) once a concurrency slot frees up, instead of relying on the frontend to re-issue every queued item.