Migrate to Exoware's Public API

[patrick-ogrady]

https://github.com/exowarexyz/monorepo

[kallal79]

I'd like to work on this issue because I specialize in secure, reproducible infrastructure and backend integration. I’ve contributed to post-quantum cryptography tooling and standardized CI workflows in Veraison, and I’m comfortable migrating systems to new APIs while preserving performance and clarity.

Plan of Action:

Review the Exoware monorepo and document the public API endpoints and auth flow.

Audit Alto’s current integration points and identify where the migration impacts data flow or consensus logic.

Refactor API calls to use Exoware’s public interface, ensuring compatibility and error handling.

Validate performance and correctness through annotated tests and reproducible benchmarks.