feat(code-runtime): complete sandboxed Node execution and Session fixtures

packages/code-runtime/code-runtime-node/tests/setup.ts

@@ -1,4 +1,6 @@
 import { Context } from '@deepseek-ai/cordis'
+import { onTestFinished } from 'vitest'
+import SessionStore from '@deepseek-ai/dsh-session'
 import FileSystem from '@deepseek-ai/dsh-fs-local'
 import Subprocess from '@deepseek-ai/dsh-subprocess-local'
 import Sandbox from '@deepseek-ai/dsh-sandbox-local'
@@ -9,6 +11,8 @@ import NodeRuntime from '../src/index.ts'
 import type { Config } from '../src/index.ts'
 
 export async function mountRuntime(ctx: Context, config: Config = {}, policy: { mode?: SandboxMode; workspaceRoot?: string } = {}) {
+  onTestFinished(async () => { await ctx.fiber.dispose() })
+  if (!ctx.get('sessions')) await ctx.plugin(SessionStore)
   if (!ctx.get('fs')) await ctx.plugin(FileSystem)
   if (!ctx.get('subprocess')) await ctx.plugin(Subprocess)
   if (!ctx.get('sandbox')) await ctx.plugin(Sandbox, {})