Codex CLI installs a persistent, self-updating background daemon by default

Automated excerpt

Since 0. 157. 0, just opening an interactive codex session: Starts a persistent background daemon (codex app-server --managed-daemon). It runs in its own session with no TTY and keeps running after every Codex window is closed (reparented to PID 1) until codex app-server daemon stop or a reboot. Bug found while turning it off: codex app-server daemon stop stops the app-server but leaves the pid-update-loop updater running (still alive 70 s later, had to kill it manually).

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