chore: bump dependabot-rebase reusable to current main SHA

[don-petry]

Bumps the dependabot-rebase-reusable.yml caller from the stale @v1 tag to the current main SHA of petry-projects/.github.

The @v1 tag points to an old commit that lacks:

• Fallback @dependabot rebase comment for branches with workflow files (403 workaround)
• Re-approval after update-branch to satisfy require_last_push_approval
• Correct if CMD=$(cmd); then ... else ... fi pattern (bash -e bug fix)
• contents: write + pull-requests: write job-level permissions (required for reusable to write)

This is a routine maintenance bump — no behaviour changes needed in this repo.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

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Run ID: d4571524-52e2-4849-9c41-a0fae22c8c82

📥 Commits

Reviewing files that changed from the base of the PR and between 051f051 and 7843e2e.

📒 Files selected for processing (1)

• .github/workflows/dependabot-rebase.yml

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/bump-dependabot-rebase-sha

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Copilot]

Pull request overview

This PR updates the Dependabot rebase workflow caller to use a pinned commit SHA of the org reusable workflow, aligning the repo with the current upstream implementation and its required permissions/secrets plumbing.

Changes:

• Switch petry-projects/.github reusable reference from @v1 to a specific commit SHA.
• Add workflow_dispatch to allow manual runs.
• Update job-level permissions and switch from secrets: inherit to an explicit secrets mapping.

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[don-petry]

Automated review — APPROVED

Risk: MEDIUM
Reviewed commit: 62a399aa369610c2ac53470f292beda117fb89ed
Cascade: triage → deep (see triage: haiku 4.5 → deep: sonnet 4.6 + duck: gpt-5.4 → audit: opus 4.6 for models)

Summary

This PR bumps the dependabot-rebase reusable workflow from a mutable @v1 tag to a pinned SHA, which is a net security improvement. All CI checks pass (CodeQL, SonarCloud, AgentShield all green). The permission escalation (read→write) is necessary for the reusable to perform branch updates and re-approvals, and is clearly documented; the switch from secrets: inherit to an explicit secrets block is strictly more secure than the prior state.

Findings

Minor

• [minor] .github/workflows/dependabot-rebase.yml:43 — Job permissions escalated from read to write for contents and pull-requests. This is required for the reusable to call update-branch and re-approve PRs (explained in PR body), but reviewers should confirm the GitHub App scopes are similarly scoped.

Info

• [info] .github/workflows/dependabot-rebase.yml:47 — SHA pinning (replacing @v1 mutable tag with commit SHA 9a694e5) is a best-practice security improvement — the exact code that runs is now immutable.
• [info] .github/workflows/dependabot-rebase.yml:49 — Switching from secrets: inherit (passes ALL secrets) to explicit APP_ID + APP_PRIVATE_KEY mapping is a least-privilege improvement.
• [info] .github/workflows/dependabot-rebase.yml:50 — APP_PRIVATE_KEY is forwarded to the petry-projects/.github reusable. This is the same org, pinned to a verified SHA, and is no regression from the prior secrets: inherit which already passed it. The App's actual permission scope is determined by its GitHub App installation — out of scope for this diff.

CI status

All CI checks pass: CodeQL (actions+python), SonarCloud (0 issues, 0 security hotspots), AgentShield, dependency-audit. No failures or warnings.

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Reviewed by the don-petry PR-review cascade (triage: haiku 4.5 → deep: sonnet 4.6 + duck: gpt-5.4 → audit: opus 4.6). Reply with @don-petry if you need a human.