Changes in version 0.1.0 (2026-07-01)                  

  - Initial release.
  - Functions for the complete cleaning pipeline: map_ids(),
    mark_time_periods(), standardize_to_seconds(), interpolate_gaps(),
    fix_tag_replacement(), and clean_playground_data().
  - Two-phase gap interpolation: phase 1 for small gaps, phase 2 for
    larger gaps with minimal position change.
  - Configurable time interval for standardization (unit parameter) and
    matching interpolation step (time_step).
  - All column names are user-configurable with sensible defaults.
  - Bundled example dataset (10 participants, 40m x 60m space, ~13
    minutes) in inst/extdata/.