Returns (and creates if needed) the directory where tidybrreg stores
Parquet snapshots. Location follows R's standard user data directory
convention via tools::R_user_dir("tidybrreg", "data").
Override with options(brreg.data_dir = "/custom/path").
See also
brreg_snapshot() to save snapshots,
brreg_open() to read them.
Other tidybrreg snapshot functions:
brreg_cleanup(),
brreg_import(),
brreg_manifest(),
brreg_open(),
brreg_snapshot(),
brreg_snapshots()