Function process_has_boot_id 

pub fn process_has_boot_id(pid: u32, boot_id: &str) -> bool

Prove that one process carries the exact boot ownership marker inherited from its rbnx boot parent. This is also the portable identity fallback for the detached watchdog on targets (notably macOS) without Linux procfs start ticks. Inspection failure is a mismatch so stale PIDs are never trusted.