Changes in version 0.3.12                        

  - Report only shows the "Eligibility" section when tracking steps
    exist (supports pure data-processing datasets such as the SPEI
    base).

                        Changes in version 0.3.0                        

  - Big-data optimizations: cache, assume_unique, cb_checkpoint().
  - Standardized report module: eligibility flowchart, editable codebook
    export (HTML/DOCX/XLSX), cross-sectional / longitudinal inspection.
  - CONSORT-style flow tree: track_split(), track_outcomes(),
    flow_table().

                 Changes in version 0.1.0 (2026-06-08)                  

  - Initial API: auto_mutate(), auto_summarise(), auto_filter(),
    codebook registration and eligibility tracking.