g1: kpCellFormat, no slot
g2: kpCellFormat + cell-tooltip only (fallback path)
tip:{{ props.valueFormatted }}
g3: kpCellFormat + cell-render slot (gets value & valueFormatted)
{{ props.value }}|{{ props.valueFormatted }}
{{ props.valueFormatted === undefined || props.valueFormatted === null ? props.value : props.valueFormatted }}