Refactor Python Code, Isolate Web Service

I have an existing Python codebase where business logic, routing, and ancillary helpers are all tangled together. I need that clutter untangled so one clearly-defined web service can live in its own repository and be deployed on its own.

Here is what I’m after:

• A clean separation of concerns inside the current project—controllers, models, utilities, and configuration decoupled so each layer is easy to reason about.
• The specific web-facing component extracted into an independent Python package (or micro-service) with its own entry point, virtual-env or Dockerfile, and concise README that explains how to spin it up.
• Updated import paths and dependency management so the remaining monolith still runs untouched.
• A slim test suite proving both the standalone service and the parent app behave exactly as before.

Acceptance criteria
1. Running the extracted service with a single command (e.g., `docker compose up` or `python -m uvicorn ...`) returns the expected health-check endpoint.
2. All existing unit or integration tests in the legacy repo pass.
3. Documentation summarises architecture changes and deployment steps.

No third-party APIs are involved, so the work is fully self-contained. If you enjoy thoughtful refactoring, clear module boundaries, and Pythonic best practices, this should be a straightforward yet satisfying project.