clean_units             Padroniza/unifica unidades (esqueleto)
conama_check            Conformity check (default Class = "2") -
                        detailed
conama_limits           Limits for Brazilian CONAMA 357/2005
conama_report           Conformity report (table)
conama_summary          Conformity summary (long format)
conama_text             Text summary of conformity (bulleted,
                        formatted)
generate_analysis       Analytical paragraphs generation (rule-based,
                        no AI)
iet_carlson             Trophic State Index (Carlson) - basic
iet_lamparelli          Trophic State Index - Lamparelli (skeleton
                        v0.2.1)
iqa                     Water Quality Index (WQI / IQA)
nsfwqi                  NSF Water Quality Index (prototype v0.2.1)
plot_box                Boxplots by site/parameter
plot_heatmap            Heatmap of parameters vs. sites
plot_iqa                Plot IQA by site/date
plot_series             Time series by parameter
read_wq                 Leitura padrao de dados de qualidade da agua
render_report           Render a report (R Markdown / Quarto) from the
                        internal template
resume_wq               Descriptive summaries by group
validate_wq             Valida presenca de colunas minimas
wq_demo                 Demo water quality dataset
