Zombie flat fee fix

[jrhea]

This PR updates the shortProceeds in _applyCheckpoint() with the flat fee so that it is properly added to the zombieShareReserves

[github-actions]

Hyperdrive Gas Benchmark

Benchmark suite	Current: bec8a99	Previous: d72077d	Deviation	Status
addLiquidity: min	1633 gas	1633 gas	0%	🟰
addLiquidity: avg	67022 gas	66818 gas	0.3053%	🚨
addLiquidity: max	292669 gas	292045 gas	0.2137%	🚨
checkpoint: min	1150 gas	1150 gas	0%	🟰
checkpoint: avg	48271 gas	48567 gas	-0.6095%	✅
checkpoint: max	191478 gas	191003 gas	0.2487%	🚨
closeLong: min	1558 gas	1558 gas	0%	🟰
closeLong: avg	28094 gas	28134 gas	-0.1422%	✅
closeLong: max	149448 gas	151196 gas	-1.1561%	✅
closeShort: min	1549 gas	1549 gas	0%	🟰
closeShort: avg	29904 gas	29821 gas	0.2783%	🚨
closeShort: max	146062 gas	145678 gas	0.2636%	🚨
initialize: min	1582 gas	1582 gas	0%	🟰
initialize: avg	213314 gas	213352 gas	-0.0178%	✅
initialize: max	255137 gas	255137 gas	0%	🟰
openLong: min	1487 gas	1487 gas	0%	🟰
openLong: avg	50671 gas	50459 gas	0.4201%	🚨
openLong: max	185335 gas	184891 gas	0.2401%	🚨
openShort: min	1608 gas	1608 gas	0%	🟰
openShort: avg	50021 gas	50135 gas	-0.2274%	✅
openShort: max	180248 gas	180398 gas	-0.0831%	✅
redeemWithdrawalShares: min	1575 gas	1575 gas	0%	🟰
redeemWithdrawalShares: avg	20989 gas	19759 gas	6.2250%	🚨
redeemWithdrawalShares: max	108207 gas	57811 gas	87.1737%	🚨
removeLiquidity: min	1639 gas	1639 gas	0%	🟰
removeLiquidity: avg	150647 gas	149999 gas	0.4320%	🚨
removeLiquidity: max	324287 gas	324287 gas	0%	🟰

This comment was automatically generated by workflow using github-action-benchmark.

[jalextowle]

LGTM

[coveralls]

coverage: 95.572% (+0.003%) from 95.569%
when pulling b8ba979 on zombie-flat-fee-fix
into d72077d on main.

[jalextowle]

Something that we need to do tomorrow is turn down the number of fuzz runs used for the new test. It seems to have added around 40 minutes to the total runtime of our Solidity tests. We know that advanceTimeWithCheckpoints2 is slow, so it's not a huge surprise that we're seeing this issue.