The typecast below should be corrected as follows since Conversions.convert takes in int256 parameter. Additionally, down-casting periodLength of int or int256 to int32 could lead to overflow issue.  
https://github.com/GenerationSoftware/pt-v5-cgda-liquidator/blob/7f95bcacd4a566c2becb98d55c1886cadbaa8897/src/LiquidationPair.sol#L282
