Follow-up on the salvaged #87158: the reaper-side fix (probe with
cleanup_stale=False so the sweep never deletes its own exclusion
evidence) fully protects a healthy standalone gateway, so the
web_server.py skip-sweep gate is dropped — a stale-but-present
registration must not veto the #77276 orphan reap that motivated the
sweep in the first place.
New regression test drives the exact failure: a registration that
fails liveness validation only surfaces its PID when probed
non-destructively; with the destructive default the standalone gateway
would be hard-killed (TerminateProcess, no drain). Mutation-checked:
reverting the probe to get_running_pid() fails the test.
Kshitij Kapoor
c26762d60e