developer_analysis: write the statistics into the <attr>_info dictionary

Min, max, sum, average, ratio and spread used to come out as six
separate detail attributes from a chain of promotes and switches. One
detail wrangle now writes the enabled ones as keys of the attribute's
_info dictionary, the one Developer Attribute Initialize creates, so
they sit next to range. A missing dictionary is created. Nothing read
the old detail attributes: normalize and the ramp nodes compute their
own.

The Round toggle and Places count are honoured for the first time; the
bypassed rounding wrangle read a dictionary that never existed, and the
toggle was labelled "Label". Ratio is still sum over point count, which
is the average under another name.

Co-Authored-By: Claude Fable 5.1 <[email protected]>

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 1 file changed, 0 insertions(+), 0 deletions(-)

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