chore(ci): Maximize CI/CD values (Dependabot & Permissions)

[hyperpolymath]

This automated PR updates your CI/CD configurations to maximize value and security.

• Dependabot: Ensures github-actions is monitored for updates.
• Security: Adds permissions: read-all to workflows missing explicit permissions.

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 2f7e004595

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[chatgpt-codex-connector]

Avoid enabling Dependabot on SHA-pinned GitHub Actions

This repo deliberately pins Actions to full SHAs (.github/workflows/workflow-linter.yml:25, .github/workflows/scorecard-enforcer.yml:21-33) and workflow-linter.yml:61-77 rejects non-SHA uses: lines, but GitHub's own Dependabot docs say github-actions updates rewrite references to the latest released tag even when the workflow currently uses a specific hash. In practice, once this config starts running, its PRs will downgrade those immutable pins to mutable @v* tags and fail the repo's own workflow policy, so the automation added here will generate invalid/security-regressing updates rather than usable ones.

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