fix dismiss all Dependabot review requests

[Pigbibi]

Policy

Automatically generated Pigbibi review requests are dismissed only when the request event itself was created by Dependabot. Requests made by maintainers are preserved. Major dependency updates remain open because the existing auto-merge workflow excludes semver-major updates.

What changed

• support dependabot[bot] and app/dependabot PR authors and event actors
• react directly to review_requested events
• serialize per-PR cleanup runs without cancelling the matching event
• verify the latest paginated timeline request still came from Dependabot immediately before deletion
• keep API failures visible while treating an already-removed request as success
• do not checkout or execute PR code

Validation

• bash syntax check
• git diff --check

[github-actions]

🤖 Codex PR Review

✅ Merge allowed: No issues found

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Review by Codex PR Review bot • PR

[chatgpt-codex-connector]

💡 Codex Review

LongBridgePlatform/.github/workflows/dependabot_review_request_cleanup.yml

Line 22 in 218037c

(github.actor == 'dependabot[bot]' || github.actor == 'app/dependabot')

Remove the actor gate for manual re-requests

When a maintainer manually re-requests Pigbibi on a Dependabot PR, the review_requested workflow run has that maintainer as github.actor, so this condition skips the only cleanup job and the request remains. This contradicts the stated policy that later manual re-requests should also be dismissed; the actor restriction must be removed (and the script's later preservation check adjusted accordingly).

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