Function spawn_blocking_with_priority 

pub fn spawn_blocking_with_priority<F, R>(
    priority: ThreadPriority,
    f: F,
) -> TaskHandle<R>
where
    F: FnOnce() -> R + Send + 'static,
    R: Send + 'static,

Spawn a blocking closure on a dedicated thread and apply the given EPICS ThreadPriority to that thread before running f.

The priority application is best effort (see apply_to_current_thread); f runs regardless of whether the OS honoured the request. This is the priority-aware counterpart of spawn_blocking for IOC threads (CA server, scan) that a C IOC would run in a distinct SCHED band.