Function verify_lattice_join 

pub fn verify_lattice_join(
    original_events: &[Event],
    snapshot_event: &Event,
) -> Result<bool>

Verify lattice join property: merge(original, snapshot) == original.

If compaction is correct, the snapshot is the join of all events, so merging the snapshot with the original state should produce identical state (idempotency of join with self’s join).

Errors

Returns an error if the snapshot event cannot be deserialized.