pub const STALE_SECS: i64 = 30;Expand description
How old a heartbeat may be before a reader calls the daemon dead. Six missed beats: long enough to survive a slow filesystem, short enough that a crashed daemon is not still reported as running a task.
The single threshold every reader shares — the web UI’s /api/health and
magi doctor both call Reading::running rather than each comparing
against their own copy of this number, so a crashed daemon cannot look
alive on one screen and dead on another.