fix: harden GitHub Actions workflows#1776
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dagecko wants to merge 1 commit intoAnduin2017:masterfrom
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Re-submission of #1775. Had a problem with my fork and had to delete it, which closed the original PR. Apologies for the noise.
Summary
This PR pins all GitHub Actions to immutable commit SHAs instead of mutable version tags.
How to verify
Review the diff, each change is mechanical and preserves workflow behavior:
action@v3becomesaction@abc123 # v3, original version preserved as commentI've been researching CI/CD supply chain attack vectors and submitting fixes to affected repos. Based on that research I built a scanner called Runner Guard and open sourced it here so you can scan yourself if you want to. I'll be posting more advisories over the next few weeks on Twitter if you want to stay in the loop.
If you have any questions, reach out. I'll be monitoring comms.
- Chris (dagecko)