[codex] Refactor CLI issue pipeline startup

[VincentShipsIt]

Summary

• Extract shared CLI GitHub issue pipeline startup into issue-pipeline.ts.
• Remove duplicated parse/fetch/route/start logic from run, plan, and review commands.
• Net code reduction: 55 insertions / 67 deletions (-12 LOC).

Validation

• biome check apps/cli/src/commands/issue-pipeline.ts apps/cli/src/commands/run.ts apps/cli/src/commands/plan.ts apps/cli/src/commands/review.ts
• git diff --check origin/develop..HEAD

Notes

• Targeted Vitest and typecheck were blocked earlier by missing local dependencies while the sandbox was offline.
• Repo labels codex and codex-automation were not present, so no labels were applied.

[coderabbitai]

Important

Review skipped

Draft detected.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 31d2c96c-4c8b-4abf-a3c9-94526732656a

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/cleanup-20260523-072349-dedupe

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