tidyaudit 0.2.0

New features

• audit_export() — self-contained HTML trail visualization (interactive
  pipeline flow diagram, light/dark theme, clickable nodes/edges). No server,
  no Shiny required.
• Serialization functions: trail_to_list(), trail_to_df(), write_trail(),
  read_trail() for machine-readable trail export (RDS and JSON formats).
• tab() / tab_tap() — frequency tables and crosstabulations within
  pipelines. One-way and two-way tables with .sort, .cutoff, .wt, .na,
  .display options.
• Snapshot controls: .numeric_summary, .cols_include / .cols_exclude
  parameters on all taps to limit snapshot scope on wide datasets.
• print.audit_trail() improvements: tabular "Changes" block with
  From/To/Rows/Cols/NAs columns and +N/-N/= deltas; inline
  custom diagnostic annotations (.fns results) below each snapshot row with
  show_custom parameter.

Breaking changes

• audit_tap(): parameter label renamed to .label for API consistency with
  other taps (no deprecation — early-stage project).
• Join taps: .stat now accepts bare column names (NSE via
  enquo()/as_label()), matching filter tap behavior. Quoted strings still
  work.
• Internal snapshot field col_info renamed to schema (internal only, no
  user-facing API change).

Improvements

• audit_transform() is now generic across all vector types (numeric,
  Date/POSIXct, factor, logical, character) with type-appropriate diagnostics.
• audit_report(): removed unimplemented format = "rmd" option (deferred to
  a future version).