The distinct values of one text column, most rows first.

What a row of filter chips is built from: permit types, classes, statuses, the contractors who pull the most. Counted under the same where and search the query takes, so a chip can say how many rows it would leave.

The entity column is refused rather than served. /nodes already answers it, with first and last seen, and from a summary held per collector run — a second, uncached copy of the same list here would be the slower one.