- SerieScanner.scan() now calls _persist_serie_to_db() instead of serie.save_to_file() - Added _sync_episodes_to_db() helper to handle episode CRUD during sync - EpisodeService gains delete_by_series() for targeted episode deletion - SerieList gains add_to_db() async method for DB-based series addition - test_serie_scanner_db_writes.py covers create/update/preserve/sync scenarios - DATABASE.md updated with Series Persistence Flow section Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>