Transforms wide assessment data to long format with proficiency_level column. The wide format has separate columns for each proficiency level (pct_below, pct_approaching, pct_on_track, pct_mastered). The tidy format pivots these into a single proficiency_level column with corresponding n_students and pct values.
Examples
if (FALSE) { # \dontrun{
wide_data <- fetch_assessment(2024, tidy = FALSE)
tidy_data <- tidy_assessment(wide_data)
} # }