Backport: ci: avoid pull_request_target for backports#15211
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Use trusted issue label and push events to resolve merged PRs before running backport automation. Co-authored-by: Cursor <cursoragent@cursor.com>
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May 12, 2026
## Summary - Backports the latest backport workflow fixes from main to release-v5.0. - Switches labeled backports to trusted pull_request/workflow_dispatch handling and adds race-condition protection. - Adds clearer handling for fork PRs and workflow-file changes that cannot be auto-backported with GITHUB_TOKEN. ## Test plan - Not run; GitHub Actions workflow-only change. - Verified branch contains the expected six workflow-only cherry-picks after #15211. Made with [Cursor](https://cursor.com)
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Background
Backport of #15209.
Backports should work for internal and fork PRs without
pull_request_target.Summary
Use trusted
issues.labeledandpushevents to resolve merged PRs before running backport automation.