- delete clippy.toml (too-many-arguments-threshold=20 hack) - ChannelRow/MediaItemRow/LibraryItemRow structs for from_persistence - SnapshotId/ActivityEventId/PlaybackRecordId newtypes - DomainError variants use ChannelId/UserId instead of Uuid - ActivityEvent.channel_id: Option<ChannelId> not Option<Uuid> - InMemory repos key on newtype IDs - AlgorithmicParams struct for schedule engine - update all adapters/application/presentation callers
strip all comments, extract tests to tests/ dirs, remove #[allow(clippy::...)], extract magic numbers to constants, refactor schedule engine private methods to use param structs, add Default impls, clippy.toml for persistence constructors
