Changes in version 0.1.0 (2026-09-09)                  

  - Initial release.
  - Added price-spread, producer-share, marketing-margin, and
    consumer-rupee decomposition tools.
  - Added conventional, Shepherd, and Acharya marketing-efficiency
    measures.
  - Added stage-level marketing-channel validation and accounting
    diagnostics.
  - Added channel ranking, bootstrap confidence intervals, sensitivity
    analysis, efficiency target calculations, and loss-adjusted margins.
  - Added two illustrative agricultural marketing datasets, a vignette,
    base R plots, executable examples, and regression tests.