Build a dashboard from a description

Builds a NEW dashboard from what the person described — its name and its charts (widgets) — and saves it PRIVATE to them: nobody else sees it, and no tool can share it (they do that themselves, from the board in the app). Each widget measures one dataset grouped by one of its dimensions, so discover them first: custodo_query_analytics with no arguments lists every dataset you may chart, with its dimensions, splits and filters — copy those keys exactly. Chart shapes follow the axis: grouped by time line/area/column/bar/table/stat, by anything else column/bar/donut/table/stat, a one-number dataset stat/column/bar/table; omit viz for the first. A dataset whose windowed is false measures the present and takes no range and no compare. At most 24 widgets, and 20 boards per person — the organisation’s plan may allow fewer. Whatever the catalogue does not offer you is refused with the valid choices, and nothing is saved. Returns the board id and open_in_web: give the person the link, and read the numbers with bi_run_dashboard.