Fix: linearize callable admission with worker close

[ChaoWao]

Summary

• publish L2 callable registrations under the lifecycle lock while the worker is NEW; registrations after initialization require the READY operation lease
• hold the same lease across local, L2, and remote unregister operations, including child notification and remote cleanup
• preserve registry-only unregister semantics while NEW and reject admission after close() claims the terminal lifecycle state

These rules make callable admission linearizable with close(): a callable is either fully admitted before close begins or rejected without publishing partial registry state.

Validation

• python -m pytest tests/ut -q: 1069 passed, 13 skipped, 1 xfailed
• ruff check and ruff format --check pass on changed files
• pyright reports 0 errors on changed files
• git diff --check passes

The change and its regression coverage are device-free Python paths; no hardware-specific code is modified.

[coderabbitai]

Warning

Review limit reached

@ChaoWao, you've reached your PR review limit, so we couldn't start this review.

Next review available in: 20 minutes

You've used all free OSS reviews for now. Wait for the free limit to reset to keep reviewing this public repository.

How can I continue?

After more reviews become available, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

To avoid repeated limits, reduce automatic review volume by pausing incremental auto-reviews earlier, using label-based review opt-in, excluding WIP or generated PR titles, or requesting reviews manually when the PR is ready. If your team needs uninterrupted high-volume reviews, an organization admin can enable usage-based reviews.

How do review limits work?

CodeRabbit enforces per-developer PR review limits for each organization. Most developers receive the normal plan review availability.

For paid Pro and Pro+ PR reviews, CodeRabbit uses adaptive limits for sustained high-volume activity. When a developer's recent PR review activity reaches the 95th percentile or higher among CodeRabbit users, additional reviews become available more gradually as earlier reviews age out of the rolling window.

Please refer docs for additional details.

Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 6c55868a-d49f-4267-9b18-443e1ee65be4

📥 Commits

Reviewing files that changed from the base of the PR and between 8c5d2ae and cffc40e.

📒 Files selected for processing (2)

• python/simpler/worker.py
• tests/ut/py/test_worker/test_admission_fence.py

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}