Re-enable cargo test in CI (stellar-xdr arbitrary version mismatch)

[Miracle656]

Background

cargo test is currently disabled in the Veil CI workflow because stellar-xdr 20.1.0 requires arbitrary >= 1.4 but the version in Cargo.lock doesn't satisfy it, causing E0433/E0407 compile errors on fresh CI builds (local builds pass due to cargo cache). Fixing this restores test coverage gates on every PR.

What to build

Resolve the stellar-xdr/arbitrary version mismatch so cargo test -p invisible-wallet passes in CI on a clean build.

Key files

• contracts/Cargo.toml — dependency declarations
• contracts/Cargo.lock — pinned versions (must be committed)
• .github/workflows/ci.yml — re-enable the cargo test step

Suggested execution

git checkout -b fix/ci-cargo-test-arbitrary-mismatch

1. Run cargo tree -p stellar-xdr | grep arbitrary to see the required version
2. Add arbitrary = "1.4" (or the required version) as a direct dev-dependency override in contracts/Cargo.toml
3. Run cargo update -p arbitrary to update Cargo.lock
4. Run cargo test -p invisible-wallet on a clean build locally to confirm
5. Re-enable the cargo test step in CI and remove the disable comment

Example commit message:
fix(ci): resolve stellar-xdr arbitrary version mismatch to re-enable cargo test

Acceptance criteria

• cargo test -p invisible-wallet passes after cargo clean
• CI cargo test step re-enabled and green
• Cargo.lock committed with updated arbitrary version

---

Drips Wave · Complexity: Medium · 150 points
Comment below to request assignment. PR must include Closes #[this issue].

[samad13]

@samad13 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

hi, let me work on this

ℹ️ Repo Maintainers: To accept this application, review their application or assign @samad13 to this issue.

[drips-wave]

Congratulations, @samad13! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on April 29, 2026.

🧑‍💻 @samad13: 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.

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