Function log_guard_rejection 

pub(super) fn log_guard_rejection<T>(
    result: &Result<T>,
    worker_id: usize,
    route: &'static str,
)

Emits a WARN describing an in-band TRT JIT guard refusal.

Greppable tag: trt_jit_guard_refused. A refusal means the worker protected itself from a dangerous, uncovered chunk shape that could have triggered a process-killing pathological autotuner allocation; the client receives HTTP 503 and may retry once warmup coverage extends.