API: Reject non-finite floating defaults#17106
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Float and double field defaults are stored in schema metadata using Iceberg's JSON single-value serialization. A NaN or +/-Infinity default can currently be set through NestedField default validation even though those values are not portable JSON numbers and cannot safely round-trip through metadata. Reject non-finite floating-point initial and write defaults during NestedField default validation so invalid defaults fail before schema metadata is written.
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Float and double field defaults are stored in schema metadata using Iceberg's JSON single-value serialization. A NaN or +/-Infinity default can currently be set through NestedField default validation even though those values are not portable JSON numbers and cannot safely round-trip through metadata.
Reject non-finite floating-point initial and write defaults during NestedField default validation so invalid defaults fail before schema metadata is written.