Don't fetch user votes before Oct

[gpxl-dev]

https://github.com/airswap/airswap-voter-rewards/blob/73bbaf2952ddea70f6ed5b829dd67be7eafa1321/src/features/votes/hooks/useUserVotes.ts#L6-L25

Votes query fetches every vote the user has made in the space. For production we only care about proposal groups since launch so should trim the search.

There's already a startTimestamp param for this that we can use, see below: https://github.com/airswap/airswap-voter-rewards/blob/73bbaf2952ddea70f6ed5b829dd67be7eafa1321/src/features/votes/hooks/useGroupedProposals.ts#L49-L52

https://github.com/airswap/airswap-voter-rewards/blob/73bbaf2952ddea70f6ed5b829dd67be7eafa1321/src/features/votes/hooks/useSnapshotConfig.ts#L3-L19