Function system_ram_gib

crates/ffi/src/kernel.rs:1958–1963

Total system RAM in GiB from `/proc/meminfo` (Linux); `None` if unreadable.

()

      } else {
        ix_bench::Status::Ok
      };
      eprintln!(
        "[rs_kernel_check_anon_consts] {name}: {}/{total} passed ({secs:.3}s)",
        total - failed,
      );
      if let Err(e) = ix_bench::write_row(
        &json_file,
        name,
        status,