[C4 Finding] Fixed term markets do not update the end time on closure

[d1ll0n]

Finding: No lender is able to exit even after the market is closed

When a fixed term market closes, the end timestamp is not updated, leading to lenders being forced to wait for withdrawal on an inactive market while not being paid interest.

Solution: Force useOnCloseMarket to be enabled, and in onCloseMarket set the end time to the block timestamp of the closure.

[laurenceday]

Fixed by 05958e3

Dillon adding another commit with a missing event, but core functionality of fix in the above