Set busy_timeout: 5_000 on MusicLibrary.Repo so SQLite waits up to
5 seconds on lock contention instead of throwing SQLITE_BUSY
immediately (default is 0).
Move RepoVacuum from 0 3 to 3 3 (3:03 AM London) to avoid the
deterministic collision with RefreshScrobbles which fires on the
every-5-min cadence at the hour mark.
Claudio Ortolina
4a6c80f7a9