chore(ci): harden supply chain — pin actions to SHA + least-privilege permissions#5
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… permissions Pin every GitHub Action to its full commit SHA (floating tags are a supply-chain injection vector), add top-level `permissions: contents: read` (least privilege), and add dependabot to keep the pins maintained.
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Supply-chain + least-privilege hardening of CI.
@vNtags are a supply-chain injection vector.permissions: contents: readat the workflow level (least privilege for the defaultGITHUB_TOKEN)..github/dependabot.yml(github-actions, weekly) so the pins stay current.Changed: .github/workflows/validate.yml +perms, .github/dependabot.yml (new)
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