Sync artist data from West Yorkshire playlists
Scans the West Yorkshire playlist for new artists and adds them to the directory. In weekly mode only artists not already in the directory are fetched (≈20–30 per sync); existing profiles are left untouched. Uncheck to re-sync the full playlist.
Updates the latest release info for artists already in the directory so they stay current on the Artists page (sorted by most recent release). Processes 10 artists per batch and resumes from where it stopped if rate-limited, so repeated clicks eventually cover all artists.