fix: remove vote periods from osnap ipfs verification

[Reinis-FRP]

Motivation

Snapshot has changed its IPFS storage format, so we need to adjust oSnap bot logic.

Summary

Removes vote start/end timestamp verification from oSnap IPFS data.

Details

This may be unnecessary for some PRs. Catch-all for detailed explanations about the implementation decisions and implications of the change.

Testing

Check a box to describe how you tested these changes and list the steps for reviewers to test.

• [ ] Ran end-to-end test, running the code as in production
• [ ] New unit tests created
• [ ] Existing tests adequate, no new tests required
• [ ] All existing tests pass
• [ ] Untested

Issue(s)

Fixes #XXXX