Structured results of an analysis run inside the broker, for jfjoch_writer to
turn into <file_prefix>.mtz, _maps.mtz and _model.cif itself: the merged
reflections and the map coefficients one typed array per MTZ column, the placed
model one array per atom field (coordinates as float64). Each block is a nested
CBOR map under its own optional END key; a reader that does not know a key
skips it, as for every other END key, and unknown keys inside a block are
skipped the same way. Space groups travel as gemmi's extended H-M name, which
round-trips to the same table entry for all 564 settings.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>