[Backlog Wave 6][Contracts] Add fuzz cases for project ID symbol boundaries

[Godsmiracle001]

Area: Contracts
Wave: Backlog Wave 6

Problem:
Add fuzz cases for project ID symbol boundaries is a tracked follow-up for hardening SplitNaira across backend, frontend, contracts, CI, docs, ops, and security surfaces.

Scope:

• Confirm the current behavior and owner for this subsystem.
• Add or update implementation, tests, or documentation as appropriate.
• Keep changes focused and compatible with the existing repo patterns.

Acceptance criteria:

• The behavior or documentation gap is addressed.
• Relevant local checks pass for the touched workspace.
• Any user-facing or operational impact is documented.

---

Created from requested repository backlog expansion.

[Superray23]

@Superray23 has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

hi, i would love to work on this

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Superray23 to this issue.

[drips-wave]

Congratulations, @Superray23! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on September 30, 2026.

🧑‍💻 @Superray23: 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 @Superray23 as part of the Stellar Wave Program's 9th Wave 🥳

😎 @Superray23: 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.