fix(capture): bound cleanup and force exit so a wedge fails loudly

[ScriptedAlchemy]

Summary

• Main's latest CI failed with runtime-playground-capture.test.ts timing out at its full 600s with zero output — the capture script never exited. Fixture boot and cleanup (fixture.close(), browser.close()) were unbounded, and any lingering handle kept the process alive even after the capture settled.
• Adds a phase-reporting watchdog (480s, under the test's 600s budget) that exits with the wedged phase on stderr, bounds every cleanup step to 30s, and force-exits once the run settles so leaked handles cannot hold the process.
• Failures now also report the last capture phase, so the next CI flake names its hang site instead of an opaque rstest timeout.

Test plan

• pnpm rslint and node --check clean
• runtime-playground-capture.test.ts passes locally with the reworked script (2/2)

[changeset-bot]

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Latest commit: ab07c55

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[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-08-29T19:08:28.667204Z	ab07c55	PR opened

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[chatgpt-codex-connector]

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Reviewed commit: ab07c55923

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[chatgpt-codex-connector]

Preserve the capture phase before entering cleanup

When any capture phase fails normally, the catch stores that error and then calls cleanupCaptureResources, which unconditionally replaces currentPhase with cleanup. Consequently, the rejection handler always reports Last capture phase: cleanup even when cleanup succeeds and the actual failure occurred during fixture-boot, compile-error, or another named phase. Preserve the phase associated with the primary failure and report cleanup only when cleanup itself is what failed or wedged.

Useful? React with 👍 / 👎.

[pkg-pr-new]

npm i https://pkg.pr.new/ScriptedAlchemy/agent-bundle@36

npm i https://pkg.pr.new/ScriptedAlchemy/agent-bundle/@agent-bundle/rsc-runtime@36

commit: ab07c55