Creates a reusable rounding function with a fixed precision.
This is a curried version of roundAt that returns a function configured to
always round to the specified number of decimal places. Useful for creating
consistent rounding behavior across multiple values.
Parameters
digit: PositiveSafeIntWithSmallInt
The number of decimal places for rounding
Returns (num:number)=>number
A function that rounds numbers to the specified precision
Creates a reusable rounding function with a fixed precision.
This is a curried version of roundAt that returns a function configured to always round to the specified number of decimal places. Useful for creating consistent rounding behavior across multiple values.