Function daemon_shutdown_token 

pub fn daemon_shutdown_token() -> CancellationToken

Process-wide daemon shutdown signal (ADR-119).

Cancelled exactly once, when the daemon’s unified shutdown future resolves — before drain() begins waiting on tracked tasks — so long-running daemon components supervised outside this module observe shutdown through the same path the daemon itself does, rather than inventing their own. Clones share the underlying token; child tokens derived from it are cancelled transitively.

In non-daemon processes the token simply never fires.