Add GitHub Actions zizmor security workflow

[dartpain]

Motivation

• Add a repository-level security analysis workflow that runs Zizmor to produce SARIF results and surface them in GitHub's security view using the zizmorcore/zizmor-action.

Description

• Add .github/workflows/zizmor.yml which runs on pushes to master and on all pull requests and defines a zizmor job on ubuntu-latest that grants security-events: write for SARIF upload, checks out the repo with a pinned actions/checkout SHA, and runs a pinned zizmorcore/zizmor-action.

Testing

• No automated tests were run locally for this workflow change; the workflow will be exercised by GitHub Actions when a push to master or a pull request is created.

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Codex Task

[vercel]

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Project	Deployment	Actions	Updated (UTC)
nextra-docsgpt	Building	Preview, Comment	Apr 14, 2026 4:56pm
oss-docsgpt	Ready	Preview, Comment	Apr 14, 2026 4:56pm

[github-advanced-security]

You are seeing this message because GitHub Code Scanning has recently been set up for this repository, or this pull request contains the workflow file for the Code Scanning tool.

What Enabling Code Scanning Means:

• The 'Security' tab will display more code scanning analysis results (e.g., for the default branch).
• Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results.
• You will be able to see the analysis results for the pull request's branch on this overview once the scans have completed and the checks have passed.

For more information about GitHub Code Scanning, check out the documentation.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.65%. Comparing base (389ddf6) to head (aa938d7).
⚠️ Report is 15 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2383   +/-   ##
=======================================
  Coverage   91.65%   91.65%           
=======================================
  Files         220      220           
  Lines       18372    18372           
=======================================
  Hits        16839    16839           
  Misses       1533     1533           

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