Resolve #1660: Correct runtime portability harness API

[ayden94]

Summary

• Corrects the advanced book portability harness example so it uses the documented FluoFactory.create(...) plus app.listen() runtime flow instead of the non-existent FluoFactory.run(...) root API.
• Keeps the English and Korean Chapter 14 mirrors aligned for the docs/book-only correction.

Closes #1660

Changes

• Updated book/advanced/ch14-portability-testing.md custom adapter harness example.
• Updated book/advanced/ch14-portability-testing.ko.md with the same code flow.
• No runtime source or public API changes; no changeset is included because this is a book-only correction.

Testing

• LSP diagnostics: no diagnostics for changed EN/KO markdown files.
• pnpm verify:platform-consistency-governance — passed.
• pnpm lint — completed repository lint/TSDoc checks; existing Biome warnings/infos were reported outside the changed book files, and verify:public-export-tsdoc passed.
• pnpm exec biome lint book/advanced/ch14-portability-testing.md book/advanced/ch14-portability-testing.ko.md — Biome reported the book markdown paths are ignored, so no markdown files were processed by that command.

Public export documentation

• No public exports changed.
• No exported functions changed.
• README/source example roles are unchanged.

Behavioral contract

• No documented behavioral contracts were removed.
• No new runtime behavioral contracts were introduced.
• Runtime API remains unchanged; the docs now point to the existing documented FluoFactory.create(...) / app.listen() flow.
• Regression tests are not required for this docs/book-only correction.

Platform consistency governance (SSOT)

• English/Korean book mirrors remain synchronized for the changed example.
• Platform contract docs were not changed.
• Package README alignment/conformance claims were not changed.