Add CI workflow to auto-update Nix vendorHash

[janezpodhostnik]

• Fix outdated vendorHash in flake.nix
• Add GitHub Actions workflow that automatically recalculates and commits the Nix vendorHash whenever go.mod/go.sum change on PRs or pushes to master

Nix builds require a pre-computed hash of all Go dependencies. Without this automation, the Nix build breaks every time dependencies change and someone has to manually update the hash.

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For contributor use:

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• Code follows the standards mentioned here
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[github-actions]

Dependency Review

The following issues were found:

• ✅ 0 vulnerable package(s)
• ✅ 0 package(s) with incompatible licenses
• ✅ 0 package(s) with invalid SPDX license definitions
• ⚠️ 1 package(s) with unknown licenses.

See the Details below.

Snapshot Warnings

⚠️: No snapshots were found for the head SHA 6a2018c.

Ensure that dependencies are being submitted on PR branches and consider enabling retry-on-snapshot-warnings. See the documentation for more information and troubleshooting advice.

License Issues

.github/workflows/update-vendor-hash.yml

Package	Version	License	Issue Type
actions/checkout	6.*.*	Null	Unknown License

OpenSSF Scorecard

Package	Version	Score	Details
actions/DeterminateSystems/nix-installer-action	main	🟢 5.3	Details Check Score Reason Binary-Artifacts 🟢 10 no binaries found in the repo Code-Review 🟢 10 all changesets reviewed Maintained 🟢 10 15 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 10 Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Packaging ⚠️ -1 packaging workflow not detected Token-Permissions ⚠️ 0 detected GitHub workflow tokens with excessive permissions CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Pinned-Dependencies ⚠️ 0 dependency not pinned by hash detected -- score normalized to 0 Fuzzing ⚠️ 0 project is not fuzzed License 🟢 10 license file detected Signed-Releases ⚠️ -1 no releases found Branch-Protection 🟢 5 branch protection is not maximal on development and all release branches Security-Policy ⚠️ 0 security policy file not detected SAST ⚠️ 0 SAST tool is not run on all commits -- score normalized to 0
actions/actions/checkout	6.*.*	🟢 6	Details Check Score Reason Maintained ⚠️ 2 3 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 2 Code-Review 🟢 10 all changesets reviewed Binary-Artifacts 🟢 10 no binaries found in the repo Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Token-Permissions ⚠️ 0 detected GitHub workflow tokens with excessive permissions Packaging ⚠️ -1 packaging workflow not detected License 🟢 10 license file detected Fuzzing ⚠️ 0 project is not fuzzed Signed-Releases ⚠️ -1 no releases found Pinned-Dependencies 🟢 3 dependency not pinned by hash detected -- score normalized to 3 Security-Policy 🟢 9 security policy file detected Branch-Protection 🟢 6 branch protection is not maximal on development and all release branches SAST 🟢 8 SAST tool detected but not run on all commits

Scanned Files

• .github/workflows/update-vendor-hash.yml

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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