Find the per-dataset parquet shards for a core table

Usage

core_shard_paths(
  table,
  root = ".",
  parquet_dir = cc_stage_path("parquet"),
  exclude = release_excluded_datasets(root)
)

table: core table name (e.g. "obs")
root: workflows repo root (contains data/parquet/)
parquet_dir: directory holding the per-dataset output dirs. Defaults to the local staging root (see cc_stage_dir()), where the bulk parquet lives; an absolute path is used as-is, a relative one is resolved against root. The JSON sidecars stay in the repo and are found separately.
exclude: dataset dir names to skip; defaults to the ingests that declare calcofi.in_release: false (see release_excluded_datasets()), so an in-progress ingest's shards stay out of the release even though its parquet is on disk

character vector of readable parquet paths/globs, one per dataset