Method serialized_size

crates/ixon/src/serialize.rs:1991–1995

Calculate the serialized size of an Env.

(&self)

    if verbose {
      eprintln!(
        "[Env::put_file] section 1/6 blobs done in {:.1}s ({written} bytes \
         written)",
        sec_start.elapsed().as_secs_f64(),
      );
      sec_start = std::time::Instant::now();
    }

    // Section 2: Consts — the dominant bytes; raw_bytes stream straight