## Summary
Full Suite after #2288 still red on shard 4: `process-lifecycle.test.ts`
times out at 5s under shard transform load even after reducing
reimports.
- Move Symbol.for `process.exit` reaper onto `process-manager`
(lifecycle owner)
- Stress test reimports that module (not the full plugin graph)
- Explicit 15s timeout for the cold-transform bound stress test
## Test plan
- [x] Local process-lifecycle green (~2s)
- [ ] PR merge gate
- [ ] Post-merge Full Suite green
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **Bug Fixes**
- Improved Grok runtime process cleanup during application shutdown.
- Prevented duplicate cleanup handlers from accumulating during repeated
module loading.
- Ensured managed processes are reliably terminated when the process
exits.
- **Tests**
- Expanded lifecycle coverage to validate repeated loading scenarios.
- Increased test timeouts for more reliable stress-test execution.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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