Add plugin release manager primitives

[JoeyTeng]

Note

This PR is purely generated by LLM: OpenAI Codex (GPT-5.5 (reasoning xhigh, summaries auto)).

Summary

• Add C7 plugin lifecycle RPC contract types and method/capability constants.
• Add service-owned plugin release manager primitives for shadow prepare, pre-active health, quiesce, drain, optional handoff, promote, shutdown, and rollback.
• Add a dedicated lifecycle control client that is instance-bound, timeout-bounded, and not allowed to reuse the plugin runtime socket.
• Update C7 design and project journal docs with landing state and W5/W6 dependencies.

Validation

• cargo fmt --check
• git diff --check
• uv run --no-project /Users/hoteng/.codex/skills/project-journal/scripts/project_journal.py validate --repo /private/tmp/cbth-c7-plugin-release-manager
• cargo test --target-dir /private/tmp/cbth-c7-plugin-release-manager/target --lib -- --test-threads=1
• cargo clippy --target-dir /private/tmp/cbth-c7-plugin-release-manager/target --locked --all-targets -- -D warnings
• pre-commit hook: cargo fmt --all, cargo clippy --locked --all-targets -- -D warnings, cargo test --locked

Review Evidence

• Offline helper-backed Codex review: /private/tmp/cbth-c7-plugin-release-manager/.codex-tmp/isolated-review-sjum1plu, status passed, no actionable findings.
• Earlier helper findings around lifecycle socket routing, timeout restoration, rollback unquiesce, ambiguous quiesce, identity binding, and shadow cleanup were fixed before this PR was opened.

[github-actions]

codex/review-gate state

• head: 129aec91a2b2d922e2aafec308d941da91f016e1
• marker: none
• updated: 2026-05-19T22:01:08.175Z

[github-actions]

@codex review

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[github-actions]

@codex review

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[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Hooray!

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[github-actions]

@codex review

Note

This workflow is requesting a Codex generative AI review.
Codex may post AI-generated comments or reviews on this pull request.
Review and verify AI-generated output before relying on it for security, correctness, or merge decisions.

[github-actions]

@codex review

Note

This workflow is requesting a Codex generative AI review.
Codex may post AI-generated comments or reviews on this pull request.
Review and verify AI-generated output before relying on it for security, correctness, or merge decisions.

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Delightful!

ℹ️ About Codex in GitHub

Codex has been enabled to automatically review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

When you sign up for Codex through ChatGPT, Codex can also answer questions or update the PR, like "@codex address that feedback".