v0.18.51

v0.18.51

Parquet hardening — a wave of reader/writer corruption gaps, each found by an
adversarial mutation of a file Wadjet itself wrote and read back through the
public reader, and each now refused instead of returning wrong data.

• Parquet writer: a short write from the underlying io.Writer (fewer bytes
  taken than handed over, with no error) is detected and reported as a failure
  instead of silently finalizing a truncated file; the failure latches, so later
  writes and Close stay failed. (#926)
• Parquet reader: a v1 data page whose level section decodes fewer values than
  it declares is refused, rather than reinterpreting the level bytes as column
  values. (#923)
• Parquet reader: a dictionary page encountered in the data-page walk is refused,
  rather than being skipped after its rows were already charged (which dropped
  the tail of a column). (#924)
• Parquet reader: row-group statistics are keyed by full leaf path, so a nested
  field no longer overwrites a same-named top-level column's bounds — which could
  wrongly prune a row group. (#925)
• Parquet reader: each row-group column chunk is bound to its schema leaf by full
  path; footer metadata whose columns are swapped, duplicated, missing, unknown,
  or contradict the schema is refused, rather than silently returning one
  column's values under another's name. (#927)
• Scan: predicate pruning resolves a column by its full path, so a query on a
  top-level column is never pruned away by a nested field that shares its name.
  (#915)