Nits for UI compatibility

[jalextowle]

This PR includes some small changes required to show the correct number of Hyperdrive decimals and to see which asset the trader paid or received just by looking at the events. This is useful for historical data.

h/t @DannyDelott, @jrhea

[github-actions]

Hyperdrive Gas Benchmark

Benchmark suite	Current: 1687315	Previous: 01b0911	Deviation	Status
addLiquidity: min	1546 gas	1546 gas	0%	🟰
addLiquidity: avg	68088 gas	68606 gas	-0.7550%	✅
addLiquidity: max	307258 gas	292728 gas	4.9637%	🚨
checkpoint: min	1150 gas	1150 gas	0%	🟰
checkpoint: avg	48157 gas	48253 gas	-0.1990%	✅
checkpoint: max	191173 gas	191173 gas	0%	🟰
closeLong: min	1492 gas	1492 gas	0%	🟰
closeLong: avg	29276 gas	28388 gas	3.1281%	🚨
closeLong: max	152215 gas	152268 gas	-0.0348%	✅
closeShort: min	1494 gas	1494 gas	0%	🟰
closeShort: avg	30999 gas	30182 gas	2.7069%	🚨
closeShort: max	146908 gas	146093 gas	0.5579%	🚨
initialize: min	1451 gas	1495 gas	-2.9431%	✅
initialize: avg	213660 gas	213307 gas	0.1655%	🚨
initialize: max	253953 gas	253585 gas	0.1451%	🚨
openLong: min	1499 gas	1432 gas	4.6788%	🚨
openLong: avg	51440 gas	50773 gas	1.3137%	🚨
openLong: max	185666 gas	187405 gas	-0.9279%	✅
openShort: min	1520 gas	1520 gas	0%	🟰
openShort: avg	50604 gas	49946 gas	1.3174%	🚨
openShort: max	180737 gas	180144 gas	0.3292%	🚨
redeemWithdrawalShares: min	1488 gas	1488 gas	0%	🟰
redeemWithdrawalShares: avg	21162 gas	20389 gas	3.7913%	🚨
redeemWithdrawalShares: max	109296 gas	108516 gas	0.7188%	🚨
removeLiquidity: min	1530 gas	1552 gas	-1.4175%	✅
removeLiquidity: avg	152894 gas	150237 gas	1.7685%	🚨
removeLiquidity: max	325648 gas	324881 gas	0.2361%	🚨

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

[jrhea]

Just one question about why you don't use the helper method in openShort event