The Electron-side OpenCode killer kills by port (lsof + kill -KILL).
getOpenCodeProcessInfo returned openCodePort unconditionally, so for an
external/attached OpenCode (e.g. a user's own server on 4096) the only thing
stopping the killer from taking it down was the separate `managed` flag — a
single weak signal guarding a destructive action.
Withhold pid/port unless we actually manage the process, so the killer has no
target even if `managed` is ever miscomputed. Managed flow is unchanged.
Bohdan Triapitsyn
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