Function row_group_contains_delete 

pub(crate) fn row_group_contains_delete(
    parquet_meta: &ParquetMetaData,
    row_group_index: usize,
    file_path: &str,
) -> Result<bool>

Checks if a row group contains delete operations by examining the min value of op_type column.

Returns Ok(true) if the row group contains delete operations, Ok(false) if it doesn’t, or an error if the statistics are not present or cannot be decoded.