* fix(#4624): persist orchestrator-worktree worker lifecycle records
* fix(#4624): address review findings on the worker lifecycle protocol
* fix(#4624): require the summary path and surface torn records on status --path
* fix(#4624): distinguish no-record from torn-record, tolerate older shims in the sweep
* docs(#4624): backfill changeset PR number
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Co-authored-by: sim <sim@local>
