fix: improve test runner compatibility on Windows and ensure clean process exit

[valorisa]

Summary

• Fix test runner hanging on Windows by using
  ode --import tsx\ with --test-isolation=none\ and --test-force-exit\
• Fix \cli-flow.test.ts\ integration tests by using
  px tsx\ for child process execution
• Ensure \promptops.ts\ exits cleanly with \process.exit()\ after main completes

Changes

• \scripts/node/package.json: Updated test commands to use
  ode --import tsx --test-isolation=none --test-force-exit\
• \scripts/node/tests/integration/cli-flow.test.ts: Changed \ sx\ to
  px tsx\ in CLI_PATH
• \scripts/node/promptops.ts: Added \process.exit()\ after \main()\ resolves

[gemini-code-assist]

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