- Change _get_stats_file_path() to use get_settings_dir()/stats/ instead of
first loras root directory
- Add _migrate_from_old_location() to copy existing stats from loras root
to new location on first access, then clean up old file
- Add 'stats' to update protection skip lists (clean, extract, tracking)
to prevent data loss during ZIP/git upgrades in portable mode
- Add usage_stats entry to backup targets and restore resolver so stats
are included in automatic snapshots
