[contract][gas] Add gas-regression gates to CI

[Xhristin3]

Severity

Medium

Files

contract/test/src/{gas_benchmarks.rs,gas_limits.rs,gas_regression.rs}, .github/workflows/ci.yml

Description

contracts/test/* scaffolds appear to support gas regression assertions, but the CI workflow's gas-profiling job uses continue-on-error and doesn't gate. Without a regression gate, refactors can silently double gas usage and nobody notices.

Acceptance Criteria

• Add a baseline gas file per operation under contract/gas_baselines/
• Assert within +/-10% in CI; failing regress to fail the build
• Run gas benchmarks once per merged PR and store trending artifacts

[Paulo-byt]

Good morning, Chief Maintainer,

I am an experienced software developer with a background in open-source contributions. I would like to work on this issue and contribute a clean, well-structured, and maintainable solution.

If possible, I would appreciate the opportunity to take it on. I’m ready to follow any contribution guidelines and provide timely updates.

Thank you for your consideration.

[grantfox-oss]

🦊 GrantFox — @Paulo-byt has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #517)
2. Your PR will be reviewed by the Gatheraa maintainers

Good luck! Track your progress on GrantFox.