[parity] import * as ns — ns.default is undefined for native modules whose default is the namespace itself #8236

Split out of #6766 after PR #8229. Not a perf_hooks bug — perf_hooks is just where the node-suite pins it.

import * as ns from "node:<mod>" should expose ns.default (Node lists it among the namespace keys, and it is the CJS module.exports). For perf_hooks the key is now listed but the read is undefined:

import * as hooks from "node:perf_hooks";
Object.keys(hooks)          // ✅ includes "default" after #8229
hooks.default               // ❌ undefined
hooks.default.performance === hooks.performance
// node:  true
// perry: TypeError: Cannot read properties of undefined (reading 'performance')

Pinned by test-parity/node-suite/perf_hooks/imports/namespace-keys (line 1 passes, line 2 does not). Reproduce with ./run_parity_tests.sh --suite node-suite --module perf_hooks.

What I found

cjs_default_export_value("perf_hooks") in crates/perry-runtime/src/object/native_module.rs now returns the module namespace (added in #8229), and get_native_module_constant has a generic property == "default" branch ahead of its per-module match that consults it. Despite that, the read still resolves to undefined, so the PropertyGet { NativeModuleRef(mod), "default" } lowering — js_native_module_esm_export_value → native_module_property_by_name_impl(…, /* is_cjs */ false) — appears to return before either is reached. I did not chase it further.

Worth checking against the modules that resolve default through the separate <mod>.default tag machinery (cjs_default_namespace_name: os, path, util, url, …) — those may work by a different route, which would make this specifically about modules whose default is the namespace itself (dgram, perf_hooks).