Stabilize OpenClaw E2E pnpm fallback

[justinmoon]

Summary

• inject a pnpm shim into the OpenClaw gateway runtime when runners only have npx
• add a focused regression test covering the silent tsdown build failure path
• update the living test plan with the selector-ownership and CI failure investigation notes

Testing

• just pre-commit

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 54de1e87-f548-40e1-b700-fde6ef5067ab

📥 Commits

Reviewing files that changed from the base of the PR and between 789f4cb and 8954d9a.

📒 Files selected for processing (2)

• crates/pikahut/src/testing/scenarios/openclaw.rs
• todos/tests-living-plan.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

📝 Coding Plan

• Generate coding plan for human review comments

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 4 additional findings.