Function cpu_budget 

pub fn cpu_budget() -> usize

The CPU budget thread-pool sizing should derive from: host parallelism clamped by the container’s cgroup CPU quota (#262). available_parallelism is quota-aware on common setups, but container runtimes exist where it still reports the host cores (docling.rs#262’s 8 threads under a 4-CPU limit), so the quota files are read directly as an extra clamp — a limited container must never size pools past its throttle ceiling. On non-Linux (and wasm) the quota reads simply fail and the host count stands.