Add invoice dispute arbitration tournament

[Kingsman-99]

Overview

Add invoice dispute arbitration tournament

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.

[Henrichy]

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

Hi! I'd like to work on this issue.
I've contributed to Rust, TypeScript, backend, frontend, and smart contract projects, with a focus on delivering focused, well-tested changes. I'll keep the implementation within the requested scope, preserve existing behavior unless the issue requires otherwise, include the necessary tests and documentation, and submit a PR that's straightforward to review.
Portfolio: https://portfolio-sandy-alpha-29.vercel.app • ETA: ~2–4 hours.

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

[Emmajay12]

@Emmajay12 has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

Hello Maintainer, I’ve gone through the issue carefully and understand the expected result. I’m confident I can provide a solution that meets the requirements. I’d appreciate an assignment.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Emmajay12 to this issue.

[barnabasolutayo-lgtm]

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

Please Maintainer, assign this issue to me. I'm grateful

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

[Nasa112197]

@Nasa112197 has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

assign me to this project

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Nasa112197 to this issue.

[drips-wave]

Congratulations, @Nasa112197! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on September 30, 2026.

🧑‍💻 @Nasa112197: 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 🌊

[drips-wave]

This issue has been completed by @Nasa112197 as part of the Stellar Wave Program's 9th Wave 🥳

😎 @Nasa112197: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

🧑‍💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.