SQL server (or MS SQL) is a top of the line database geared for the cloud
Check sheet rows against table fields before loading new records.
Your reporting table gets valid new spreadsheet rows every 15 minutes, with import counts and row-specific fixes waiting in the sheet.
Export approved query results and verify the CSV row count.
Get a dated CSV and row count in your shared folder every month, or an error note explaining why the export stopped.
Load matching CSV files and log imports that fail.
Keep your PostgreSQL table current as CSV files arrive, with a row count or a clear reason when an import needs attention.