- ytdlp: add fetch_playlist_info() using yt-dlp -J --flat-playlist for
reliable container title + shallow entry list; normalize item URLs via
webpage_url → absolute url → id fallback (domain inferred from container
URL so YTM stays on music.youtube.com)
- capture: add record_container_entry() (no blob, no primary_media artifact);
extend record_media_entry() with parent_entry_id/root_entry_id params (all
existing single-item call sites pass None, None)
- capture: implement YouTubePlaylist / YouTubeChannel / YouTubeMusicPlaylist
capture path replacing the two not-implemented stubs: fetch playlist info →
create container entry (reusing existing run + item) → per-child run items
(parent_item_id = container item) → download each video/track as a child
entry; per-child failures are non-fatal; perform_capture returns result.status
reflecting actual run outcome so capture_handler marks the job correctly
- archive: add child_count i64 to EntrySummary (col 12 in all listing queries);
add get_entry_summary() private helper; fix get_entry_detail() to use
get_entry_summary() so child entries are resolvable via the detail endpoint;
add list_child_entries(conn, uid, caller_bits) with the same
admin/collection visibility predicate as list_root_entries
archive_runs.requested_count stays 1 (one user locator); discovered/
completed/failed_count reflect container item + N video items via
refresh_run_counters.
