fix(test): retry cargo test on CI

[hanabi1224]

Summary of changes

Add retry to mitigate #6565

Changes introduced in this pull request:

Reference issue to close (if applicable)

Closes

Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation. All new code adheres to the team's documentation standards,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.

Outside contributions

• I have read and agree to the CONTRIBUTING document.
• I have read and agree to the AI Policy document. I understand that failure to comply with the guidelines will lead to rejection of the pull request.

Summary by CodeRabbit

• Tests
  • Enhanced test infrastructure to improve reliability of regression and state management tests.

[coderabbitai]

Walkthrough

This pull request adds the #[fickle::fickle] attribute to test functions across the codebase, enabling flaky test handling. Changes include decorating generated RPC regression tests in the build script and state manager utility tests, with no modifications to test logic or functionality.

Changes

Cohort / File(s)	Summary
Build Script RPC Tests build.rs	Added #[fickle::fickle] attribute to generated RPC regression test functions via rpc_regression_tests_gen for flaky test handling.
State Manager Tests src/state_manager/utils.rs	Added #[fickle::fickle] attribute to 14 test functions covering state compute and state validate operations.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• test: add CI cache for rpc snapshot tests to mitigate flackyness issue #5978: Modifies the same generated RPC regression test functions, suggesting coordinated changes to the test infrastructure.

Suggested reviewers

• LesnyRumcajs
• akaladarshi
• sudo-shashank

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The PR title claims to add a retry mechanism for cargo test on CI, but the actual changes only add #[fickle::fickle] attributes to test functions in build.rs and state_manager/utils.rs without implementing retry logic.	Update the title to accurately reflect the changes, such as 'feat(test): add fickle attribute to flaky tests' or provide the actual retry mechanism implementation that the title describes.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch hm/retry-cargo-test-ci

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No actionable comments were generated in the recent review. 🎉

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 63.35%. Comparing base (86cb824) to head (2420d7d).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

Files with missing lines	Coverage Δ
src/state_manager/utils.rs	81.77% <ø> (-0.54%)	⬇️

... and 7 files with indirect coverage changes

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