fyi, i think this would be useful for you guys, as well:
https://github.com/bitcoin-core/secp256k1/issues/702
#702 is something im planning to pick up early 2025 and work on, would be happy to help with SHANI stuff here a) for my own benefit to get hands on and learn and b) to dogfood the implementation in libsecp256k1 with a real use case