Normalize error codes into a documented range

[arisu6804]

Summary

Normalize error codes into a documented range.

Context

Tracking issue for the RemitFlow smart contract. Open to contributors.

Acceptance criteria

• Implement the change described above
• Add or update automated tests
• Update the relevant documentation

[grantfox-oss]

🦊 GrantFox — @Cmitchelle7 has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #103)
2. Your PR will be reviewed by the RemitFlow maintainers

Good luck! Track your progress on GrantFox.

[arisu6804]

Assigned, @Cmitchelle7! 📋 Normalizing the error codes into a documented range will make the whole contract easier to reason about — thanks for taking it.

Questions or just want to say hi? Our contributor group: https://t.me/+8DgYV9HrNaA1Yjg1