Část 2·před 84 d
Define the CSV dialect and destination schema before appending: encoding, delimiter, headers, column types and empty-value policy. Batch rows to respect API quotas, retain the source row number, and use a stable import identifier so a retry cannot append the same data twice. Neutralize spreadsheet-formula prefixes in untrusted cells. Treat partial writes explicitly by recording the last confirmed batch and counts for accepted and rejected rows. A failed retry should resume from that checkpoint rather than restart the file.