chore: dismiss Dependabot review requests

[Pigbibi]

What changed

• dismiss Pigbibi review requests automatically generated for Dependabot PRs
• recognize both dependabot[bot] and app/dependabot identities
• require the review-request event actor to be Dependabot
• re-check the latest Pigbibi review-request actor from the PR timeline immediately before deletion
• preserve later or concurrent review requests made by maintainers
• keep concurrent review-request runs instead of cancelling the matching cleanup
• use pull_request_target with metadata-only GitHub API access and no checkout

Why

These repositories already auto-merge eligible non-major Dependabot updates after CI, but CODEOWNERS creates redundant review notifications. Event-actor and timeline checks let the workflow remove only bot-generated requests without touching human review requests, including race conditions while a run is queued.

Validation

• verified automatic CODEOWNERS timeline actor on a historical Dependabot PR
• verified both supported Dependabot identities
• verified requested reviewer, event actor, and latest timeline actor conditions
• verified API errors fail instead of being treated as no match
• verified no checkout or execution of PR code
• bash syntax check
• git diff --check

[github-actions]

🤖 Codex PR Review

✅ Merge allowed: 1 finding(s) reported but none are blocking

ℹ️ Other Findings

1. 🟡 [MEDIUM] Logic in .github/workflows/dependabot_review_request_cleanup.yml

The workflow calls issues/{PR_NUMBER}/timeline?per_page=100 once and then treats [-1] from that single page as the latest review_requested event for Pigbibi. GitHub paginates timeline results, so for pull requests with more than 100 timeline events this only inspects the first page, not the true most recent matching event. In that reachable case, the job can misclassify the current review request and either delete a maintainer-requested review or fail to dismiss the redundant Dependabot-generated one. (line 39)

Suggestion: Fetch the complete matching history before selecting the latest event, or query pages until exhaustion and then choose the last matching review_requested event. At minimum, use pagination-aware gh api --paginate handling before computing the final actor.

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Review by Codex PR Review bot • PR

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: a871285386

ℹ️ About Codex in GitHub

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