Downloads a Psychic model file. The request body selects the model
(1, 2, 3, 4, m1, m2, m3, m4, model1, model2,
model3, or model4).
Models 1, 2, and 3 may set date to latest or a YYYY-MM-DD
date. When date is omitted, the latest daily model is used. Models 1,
2, and 3 may also request an inclusive date range with start_date and
end_date; ranges are limited to 30 days and return one combined
download.
Model 4 downloads the latest model 4 artifact. Model 4 may omit
date or set date to latest, but does not support historical
dates, start_date, or end_date.
Set format to mmdb to download a MaxMind DB file. When format
is omitted, the binary model format is used.

License: This endpoint requires the Psychic model meter entitlement
for the requested model. Historical dates also require that model's
Psychic lookback-days entitlement to cover the requested date or range
start date.