Sibling of rds_from_url() for release assets published as parquet
(e.g. the wnba_stats_leaguedash / nba_stats_leaguedash cube tags).
404-safe: an unpublished asset returns an empty data.table + a warning,
matching rds_from_url()'s contract, instead of raising.
Value
a dataframe as created by arrow::read_parquet()
