Add invoice carbon credit linkage

[Kingsman-99]

Overview

Add invoice carbon credit linkage

Requirements

• Implement core functionality
• Add proper events and logging
• Write comprehensive tests

Acceptance Criteria

• Feature implemented
• All tests pass
• cargo test --workspace passes
• cargo clippy produces zero warnings

Definition of Done

All CI checks must pass before the PR is reviewed.

[IFEANYIBRIGHT]

@IFEANYIBRIGHT has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

Hi! I’m a full-stack developer with a strong blockchain background. I’d love to handle this issue and can deliver a clean, reliable solution. Kindly assign it to me.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @IFEANYIBRIGHT to this issue.

[edwarddavid929-png]

@edwarddavid929-png has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

can i work on this?

ℹ️ Repo Maintainers: To accept this application, review their application or assign @edwarddavid929-png to this issue.

[drips-wave]

Congratulations, @edwarddavid929-png! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on September 30, 2026.

🧑‍💻 @edwarddavid929-png: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊