ci: adopt zizmor workflow security linting

[uw-ssec-bot]

Adds the centrally managed zizmor workflow security linter, following the pattern established across SSEC repos.

Part of the org-wide security hardening initiative.

[coderabbitai]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 2281cc92-13f9-4c3e-a789-4766922a3a62

📥 Commits

Reviewing files that changed from the base of the PR and between c67fef1 and 6ffabce.

📒 Files selected for processing (1)

• .github/workflows/zizmor.yml

📝 Walkthrough

Walkthrough

A GitHub Actions workflow for security linting of workflow files is added, which invokes a centrally managed reusable workflow from an external repository with enforce set to false.

Changes

Workflow Security Lint Configuration

Layer / File(s)	Summary
Trigger & Top-Level Configuration ``.github/workflows/zizmor.yml` (lines 1–14)	Workflow named "Workflow security lint" triggers on pull_request and push to main when .github/workflows/** files change. Top-level permissions are set to an empty object.
Job Definition & Reusable Workflow ``.github/workflows/zizmor.yml` (lines 15–22)	lint job uses the external reusable workflow uw-ssec/.github/.github/workflows/zizmor-lint.yml@main with job-level permissions (contents: read, security-events: write) and passes enforce: false as input.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A curious rabbit added security's shine,
A zizmor workflow to lint workflows fine!
With permissions just right, the config so neat,
This safety-first merge makes the check complete! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'ci: adopt zizmor workflow security linting' directly and clearly summarizes the main change: adding the zizmor workflow security linting tool to CI/CD configuration.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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