fix(code-runtime): separate model environment from native startup paths

packages/code-runtime/code-runtime-node/tests/process.spec.ts

@@ -11,7 +11,7 @@ import { decodeCodeJsonWire, encodeCodeJsonWire } from '../src/json-wire.ts'
 it('boots an unbuilt source closure outside the workspace and exchanges tool replies', async () => {
   const directory = await mkdtemp(join(tmpdir(), 'dsh-node-source-'))
   onTestFinished(async () => { await rm(directory, { recursive: true, force: true }) })
-  for (const file of ['process.ts', 'bootstrap.ts', 'channel.ts', 'json-wire.ts', 'output-json.ts', 'protocol.ts']) {
+  for (const file of ['process.ts', 'bootstrap.ts', 'channel.ts', 'json-wire.ts', 'output-json.ts', 'protocol.ts', 'environment.ts']) {
     await copyFile(new URL(`../src/${file}`, import.meta.url), join(directory, file))
   }
   const source = `import {Socket} from 'node:net';import {runNodeMain} from ${JSON.stringify(pathToFileURL(join(directory, 'process.ts')).href)};await runNodeMain(new Socket({fd:7,readable:true,writable:true}),100000,process);`