Use GitHub App client ID for project sync token

[zackees]

Summary

• update add-to-project workflow to use actions/create-github-app-token@v3
• switch token generation from legacy PROJECT_APP_ID to PROJECT_APP_CLIENT_ID
• add the matching PROJECT_APP_CLIENT_ID repo Actions variable

Notes

This does not install the GitHub App. The FastLED-owned app with client ID Iv23liL4dLxjYFwTNWKt still needs to be installed on the FastLED org for token generation to succeed.

Related: FastLED/FastLED#2383

Summary by CodeRabbit

• Chores
  • Updated GitHub Actions workflow configuration for project automation.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: edb8e9cc-0ee7-4c8a-9898-8d05f4de3dd9

📥 Commits

Reviewing files that changed from the base of the PR and between b85edbc and 82143d3.

📒 Files selected for processing (1)

• .github/workflows/add-to-project.yml

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📝 Walkthrough

Walkthrough

The workflow configuration was updated to align with newer GitHub App token generation practices. The actions/create-github-app-token action was upgraded from v1 to v3, and the corresponding input parameter was changed from app-id to client-id with a new variable reference.

Changes

Cohort / File(s)	Summary
GitHub Workflow Update .github/workflows/add-to-project.yml	Updated conditional guard and token-generation step to use vars.PROJECT_APP_CLIENT_ID instead of vars.PROJECT_APP_ID, and upgraded action from v1 to v3 with corresponding input parameter rename from app-id to client-id.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related issues

• project-automation cannot create GitHub App token for FastLED project sync FastLED#2383: Directly addresses the same GitHub Actions token-generation step modifications, including action version upgrade and input parameter changes from app-id to client-id.

Poem

🐰 A workflow hops to version three,
With CLIENT_ID, now proud and free,
Old app-id tokens fade away,
Fresh GitHub Actions save the day! 🚀

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and concisely describes the main change: updating the workflow to use GitHub App client ID instead of app ID for token generation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix-project-app-token-client-id

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