Giorgi / DuckDB.NET / 37240554236

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Append BigInteger to UHUGEINT columns as an unsigned value

NumericVectorDataWriter.AppendBigInteger always wrote a DuckDBHugeInt,
whatever the column type. On a UHUGEINT column a value of 2^127 or more
threw ArgumentOutOfRangeException, and a negative value was written as
its two's-complement bytes, so -1 was stored as a huge positive number.
UHUGEINT[] list and array columns were affected too.

Write a DuckDBUHugeInt when the column is UHUGEINT. Its constructor
checks the range 0 to 2^128 - 1, so out-of-range values now throw.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CzLKjBGAwccxYB6ny5bpmY

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