chore: add license check CI action

[MalteHerrmann]

This PR adds the functionality to run the go-license tool in CI.

[coderabbitai]

Walkthrough

A new Makefile target named check-license is added. It invokes go-license with the repository’s existing configuration and FILES variable, using the --verify flag. No existing targets are modified. The target must be explicitly run and returns failure on non-compliant license headers.

Changes

Cohort / File(s)	Summary
Build tooling Makefile	Added target check-license running go-license --config .github/license.yml $(FILES) --verify; no other targets changed.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

I twitch my ears at headers bold,
A hop through files, both new and old—
“check-license,” I thump with glee,
Ensuring texts align with decree.
If lines go stray, I gently squeak,
Then nibble fixes, tidy and sleek. 🐇✨

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✨ Finishing Touches

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• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch add-license-check

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[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (3)

Makefile (3)

72-74: Reorder flags to avoid potential CLI parsing issues.

Some CLIs require all flags before positional args. To be safe, pass --verify before $(FILES).

-check-license:
-	@go-license --config .github/license.yml $(FILES) --verify
+check-license:
+	@go-license --config .github/license.yml --verify $(FILES)

---

102-102: Mark the new target as phony.

Add check-license to .PHONY to prevent Make from treating a same-named file as up-to-date, which could accidentally skip the check.

-.PHONY: license format lint build install local-image
+.PHONY: license check-license format lint build install local-image

---

72-74: Confirm CI wiring calls this target.

The PR description mentions adding a CI action. Ensure your workflow actually runs make check-license (or the equivalent) so verification happens on PRs.

Happy to draft a minimal GitHub Actions job that installs the tool and runs this target if you’d like.

📜 Review details

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Review profile: CHILL

Plan: Pro

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📥 Commits

Reviewing files that changed from the base of the PR and between 5264ac1 and 86b3767.

⛔ Files ignored due to path filters (1)

• .github/workflows/check-license.yaml is excluded by !**/*.yaml

📒 Files selected for processing (1)

• Makefile (1 hunks)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (3)

• GitHub Check: prepare
• GitHub Check: build
• GitHub Check: build-and-push-image