Changes in version 0.1.0                        

  - Removed direct assignment to .GlobalEnv in record correction.
    Per-record seeds now use withr scopes that restore the caller's RNG
    state and kind, including on errors. Seeds remain deterministic
    across workers and batches.
  - Replaced superassignment in routing diagnostics, logical-edit repair
    and admissible-pattern counting with explicit, per-call local
    environments.
  - Random sequences differ from the previous submission. Checkpoint
    fingerprints now include the RNG scheme version, preventing reuse of
    old checkpoints.
  - Added an internal null-default operator for compatibility with the
    declared R >= 4.2 requirement (the base operator is only available
    from R 4.4).