Upgraded Q -> 3 from #148 [1677186744098]

Judge has assessed an item in Issue 148 as 3 risk. The relevant finding follows: Lines of code Vulnerability details Impact Detailed description of the impact of this finding. buyoutLien in LienToken.sol failes to update the new PublicVault's slope, yIntercept, and s.epochData....liensOpenForEpoc...