Error in Excel or csv download

As reported by a user, when I try to download this data series https://db.nomics.world/RBA/G1/GCPIAG, in Excel format or in csv, I obtain NA after 1970-06-01 in the downloaded file, but there are values in the UI. Remark : the values before the date are the same in Excel/csv and in UI.

Tasks

• remove series completion in dbnomics-data-model
• update dbnomics-docs about series completion