[BUG] Parsing Groth16 proofs from JSON is limited to 64 bits per public input

[Victor Graf]

Bug Report

Due to the following line, parsing a Groth16 proof from JSON is limited to 64-bits per public input. As a result, some proofs will not be verifiable. It does not effect verification of RISC Zero's Groth16 proofs for the zkVM, because we do not use the JSON encoding.

https://github.com/risc0/risc0/blob/main/risc0/groth16/src/data_structures.rs#L246

[linear]

ZKVM-370 [BUG] Parsing Groth16 proofs from JSON is limited to 64 bits per public input

[Victor Graf]

@capossele , this was solved by #1420, ya? If so, feel free to close this

[Victor Graf]

Addressed in #1420