ci: CodeQL language matrix -> actions

[hyperpolymath]

Problem

.github/workflows/codeql.yml declared the CodeQL language javascript-typescript, but this repo contains no JS/TS source. As a result the analyze (javascript-typescript) job failed "no source files found" on every run, producing zero SAST signal.

Fix

Set the CodeQL language matrix to exactly actions. CodeQL's actions language scans the GitHub Actions workflow files (which this repo has), giving real, actionable SAST coverage. Per the repo's own Hypatia workflow_audit recommendation.

Change

• Matrix include entry: language: javascript-typescript -> language: actions.
• The rest of the workflow is untouched; category: "/language:${{ matrix.language }}" is preserved (it parameterises on matrix.language).
• Only .github/workflows/codeql.yml is modified.

https://claude.ai/code/session_017TXizM5c1Yd9HWf7Y15YH2

---

Generated by Claude Code

[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.