ci: add Claude Tier 0 baseline PR review caller

[williaby]

Summary

Adds the Tier 0 Claude baseline PR reviewer as a thin caller of the org reusable workflow in ByronWilliamsCPA/.github. Part of the org-wide tiered-pr-review rollout.

• Pinned to a reachable .github main SHA (8de6560); Renovate-tracked.
• Explicit ANTHROPIC_API_KEY mapping (least-privilege), not secrets: inherit.
• No caller-level concurrency block (the reusable owns concurrency; a caller block would deadlock at startup).

The Claude GitHub App is installed org-wide and ANTHROPIC_API_KEY is an org secret (visibility: all), so no per-repo setup is required.

Verification

This PR adds the reviewer's own workflow file, so the action's tamper guard will skip the actual review on this PR; the signal is that the run reaches a job (skip) rather than a zero-job startup failure.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Run ID: 003fbc92-f612-4950-8b63-2766fba8ecfd

📥 Commits

Reviewing files that changed from the base of the PR and between a06abe3 and 2306b0b.

📒 Files selected for processing (2)

• .github/workflows/claude-baseline-review.yml
• CHANGELOG.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch claude/baseline-review-rollout

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[github-actions]

⚠️ Deprecation Warning: The deny-licenses option is deprecated for possible removal in the next major release. For more information, see issue 997.

Dependency Review

The following issues were found:

• ✅ 0 vulnerable package(s)
• ✅ 0 package(s) with incompatible licenses
• ✅ 0 package(s) with invalid SPDX license definitions
• ⚠️ 1 package(s) with unknown licenses.

See the Details below.

License Issues

.github/workflows/claude-baseline-review.yml

Package	Version	License	Issue Type
ByronWilliamsCPA/.github/.github/workflows/claude-baseline-review.yml	8de6560ef6089fa95d56c77186648186dac6ce26	Null	Unknown License

Denied Licenses:

GPL-2.0, GPL-3.0

OpenSSF Scorecard

Package	Version	Score	Details
actions/ByronWilliamsCPA/.github/.github/workflows/claude-baseline-review.yml	8de6560ef6089fa95d56c77186648186dac6ce26	Unknown	Unknown

Scanned Files

• .github/workflows/claude-baseline-review.yml

[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