Refactor legacy flat node files into modular engine/ and nodes/ packages while preserving compatibility aliases for existing workflows.
Add dedicated OpenAI-compatible node routing, keep LLM text enhancer as the primary local route, and refresh README release guidance for the modular architecture update.
Fix copilot wrapper synchronization so patched helpers propagate to runtime during behavior tests, and align package version assertions to 1.1.0.
Verify sanitizing behavior and supplementary coverage with green tests before release tagging.
Co-Authored-By: Claude <noreply@anthropic.com>
