sp1 has insufficient observation of cumulative sum
During proof generation, the prover must observe all values sent to the verifier to generate valid Fiat-Shamir challenges. Prior to v3.0.0 the cumulative sum of the permutation argument was not observed when sampling zeta, which is a random challenge sampled to force the constraints to be true. In v3.0.0, this is fixed by observing the cumulative sum into the challenger, which can is done by observing the commit to the …