- Item 1: Extract GetUserByID/GetChannelByID lookup methods, use from relation methods
- Item 2: Initialize slices with literals so JSON gets [] not null
- Item 3: Populate CreatedAt/UpdatedAt with time.Now() on all Create methods
- Item 4: Wrap each migration's SQL + recording in a transaction
- Item 5: Check error from res.LastInsertId() in QueueMessage
- Item 6: Add DequeueMessages and AckMessages methods
- Item 8: Add GetUserByNick, GetUserByToken, DeleteAuthToken, UpdateUserLastSeen
- Item 9: Run PRAGMA foreign_keys = ON on every new connection
- Item 10: Builds clean, all tests pass
