[PROC-4] - Recreate supplier catalog from data

[Alex-Cosma]

in DirectAcquisitionContractDetails's "directAcquisitionItems" we find:

(to the best of my knowledge) there is no way to access the online catalog with items institutions can browse, however, we have all the contracts so we can rebuild that catalog from the data 😌

Grouping items by cpv code, then throwing in a min/average/max of that, we can recreate most of the catalog within a new mongo collection