Function register_name

crates/compile/src/decompile.rs:4669–4671

Register a Name in `stt.env.names` so `decompile_name` can resolve it. Mirrors `compile_name` (content-address the name, insert into names map).

(stt: &CompileState, name: &Name)

    Some(named) => named.original(),
    None => None,
  };
  let Some((orig_addr, orig_meta)) = original else {
    return false;
  };
  let had_entry = dstt.env.contains_key(name);
  let synthetic = Named::new(orig_addr, (*orig_meta).clone());