chore: added cosign to list in common.mk

[rebEllieous]

What

added cosign to tool list

Summary by CodeRabbit

• Chores
  • Added Cosign to the configured Go-installed tooling.
  • Removed a duplicate OpenAPI generator configuration entry.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 9da618e9-6b38-47fd-94c5-0a7929fe2d02

📥 Commits

Reviewing files that changed from the base of the PR and between ee5da7d and cccbb14.

📒 Files selected for processing (1)

• common.mk

Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review.

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📝 Walkthrough

Walkthrough

Changes

Tool configuration

Layer / File(s)	Summary
Update tool variables common.mk	Adds the COSIGN tool path and removes the duplicate OPENAPI_GEN declaration.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to cccbb

This localized change adds cosign to the common tool list and presents no actionable merge-blocking risk beyond normal checks and review.

Suggested reviewers: olzemal

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description states the change but includes only the What section. It omits testing details, reviewer notes, checklist status, and the issue reference.	Complete the required pull request template. Add the issue reference, testing performed, applicable reviewer notes, and checklist responses. Remove sections only when they are not applicable.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: adding cosign to common.mk tool configuration.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)

• Fix all pre-merge checks with AI

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/687-signing-render-artifacts

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[olzemal]

lgtm.

This could also be added to the flake packages. Maybe we should discuss what our preference is at some point.