Bug 1: Inlined VARCHAR values exported as NULL in Parquet

Bug 1: Inlined VARCHAR values exported as NULL in Parquet: a task in LegoFlow-SWE (Harbor dataset). When exporting a table that contains VARCHAR columns to Parquet (via COPY or COPY with a SELECT ), columns where every string value is short enough to be stored inline are incorrectly exported as…

The task

When exporting a table that contains VARCHAR columns to Parquet (via `COPY` or `COPY` with a `SELECT`), columns where every string value is short enough to be stored inline are incorrectly exported as entirely NULL. The export logic attempts to determine whether a column is all‑NULL by checking if the **data page**…

Part of Lego-X/LegoFlow-SWE.