Constant INTERNAL_PARQUET_FIELD_ID_BASE 

pub(crate) const INTERNAL_PARQUET_FIELD_ID_BASE: u32 = _; // 1_073_741_824u32

Parquet field ID base for internal columns (__primary_key, __sequence, __op_type). Uses bit 30 to distinguish from user column IDs and fit in positive i32 range.