fix(qwp): keep SF slot locked until manager worker quiesces#67

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bluestreak01 wants to merge 16 commits into

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fix/qwp-worker-quiescence

Commits on Jul 10, 2026

test(qwp): pin slot retention until worker quiescence
bluestreak01
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fix(qwp): make engine close a worker-quiescence barrier before releasing slot resources
bluestreak01
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fix(qwp): preserve slot ownership after incomplete close
bluestreak01
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test(qwp): pin slot retention on the owned-manager close path
bluestreak01
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perf(qwp): wake quiescence waiters only when one is parked
bluestreak01
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fix(qwp): transfer slot cleanup to the worker's exit path and recover retired pool slots
bluestreak01
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test(qwp): pin slot retention when worker-exit handoff registration fails
bluestreak01
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fix(qwp): publish close completion only after confirmed slot flock release
bluestreak01
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fix(qwp): retain startup-retired recoverers so a late flock release restores pool capacity
bluestreak01
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fix(qwp): give capacity-starved borrows a final retired-slot probe before the timeout check
bluestreak01
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test(qwp): close the remaining engine/manager shutdown coverage gaps
bluestreak01
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