Evict a worker that never acknowledges a kill - #2707
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What and why
Adds bounded recovery for workers that receive a kill request but never acknowledge it, preventing them from remaining stuck indefinitely.
How was this verified?
Added a test for a live worker that never acknowledges a kill. All 33 scheduler, config, and worker API server tests pass, with clippy clean.
Risk
Low. The change only affects workers with unacknowledged kill requests and uses a configurable timeout with a 60s default.
This change is