Changes in version 0.1.0 (2026-07-24)                  

  - Initial implementation of the BOJ code, layer, and metadata APIs.
  - Automatic 250-code chunking and NEXTPOSITION pagination.
  - Request pacing with a one-second minimum, retries, and timeouts.
  - Metadata caching with automatic stale-entry removal and explicit
    refresh, prune, and clear operations.
  - Long and wide data outputs with exact BOJ period codes and parsed
    dates.