Function format_psi_avg_centi_percent 

pub fn format_psi_avg_centi_percent(v: u16) -> String

Convert a centi-percent value (0..=10000) to its display form N.NN%. The centi-percent representation is 1:1 with the kernel’s LOAD_INT.LOAD_FRAC 2-decimal-digit emission at kernel/sched/psi.c:1284 — preserve that precision on display.