Function now_ns

src/watcher/watcher.c:134–138

/* ── Time helper ────────────────────────────────────────────────── */

static int64_t now_ns(void) {
    struct timespec ts;
    cbm_clock_gettime(CLOCK_MONOTONIC, &ts);
    return ((int64_t)ts.tv_sec * NS_PER_SEC) + ts.tv_nsec;
}

/* ── Adaptive interval ──────────────────────────────────────────── */