The server-side logic for the `csvFileInput` module. It uses the `DataManager` R6 class to handle all data processing.
csvFile(input, output, session, nfactor.limit = 20)
A reactive expression that returns a list with two elements: `data` (the processed data.table) and `label` (a data.table with variable label information).
Standard Shiny server parameters.
An integer, the threshold for unique values to suggest a numeric variable as categorical, Default: 20