Giorgi / DuckDB.NET / 37447279017

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Accept a BigInteger property for UHUGEINT columns in the mapped appender

The validation required the single DuckDB type a .NET type maps to, so a
BigInteger property was accepted only for HUGEINT. It now checks the column
against the types the property can be appended to: HUGEINT and UHUGEINT for
BigInteger, the mapped type for everything else. The range is checked per
value when it is appended.

The mismatch error names every accepted type and prints the underlying type
of a nullable property.

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

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