v4.36.0

Fixed — the grouped form existed and authors still built tables by hand

Two acceptance runs over the same three CSVs registered 22 and then 47
derivations. The second was 41 scalars against 6 tables, and six of those
scalars were mean-and-negative-rate across three price bands: a two by three
table, spelled out one cell at a time. Of the seven cross tabulations the
pipeline had already computed and listed, that run placed none, and the run
before it placed two.

Nothing was wrong with any individual request, which is exactly why nothing
stopped it. Every one returns a working number, and the author never finds out
the table was one call away.

• Three or more one-cell derivations that differ only by a row filter are
  refused, and the refusal writes out the single grouped request that
  replaces them — with a note to supply bucket edges when the filters cut a
  numeric range, since those are the author's to choose. Two of a shape is a
  comparison and is left alone.

• The brief leads with the tables that are already built. They were listed
  in ledger order among two dozen single-column summaries, which is where they
  were hardest to find and where they carry the most. They now have their own
  section, above the summaries, each with the [TABLE:] marker that places it,
  and the registration guide says to work through that list before registering
  anything.