chore(ci): harden Dependabot auto-merge workflow#1189
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Gate on the PR author (pull_request.user.login) instead of github.actor, which reflects the triggering actor and not the author. Pin dependabot/fetch-metadata to a commit SHA. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Follow-up hardening for the auto-merge workflow added in #1188, from a security review.
Changes
github.actorreflects whoever triggered the latest event (e.g. a re-run), not the PR author. Switch togithub.event.pull_request.user.login == 'dependabot[bot]'so the job only runs for PRs actually opened by Dependabot.dependabot/fetch-metadatato a commit SHA (25dd0e3# v3.1.0) instead of the mutable@v3tag, closing the supply-chain window on that step.Not changed (by design)
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