Add FastAPI as a backend framework option

[aduquehd]

Adds FastAPI as a fifth backend framework choice for the interview setup, alongside Rails, Spring, Node, and Django.

Context

FastAPI has become one of the most widely used web frameworks in the Python ecosystem — for many Python developers today it's the default choice for building APIs. Offering it as an option lets people run Minicom on the stack they already use daily, implementing exactly the same contract as the existing backends.

Changes

• New fastapi/ backend with the same functionality as the other frameworks: POST /foo and POST /bar return {"success": true} on port 3000, with permissive CORS matching the Django service
• Structure intentionally mirrors the Django backend so it feels familiar: urls.py (central route registration), api.py (endpoint handlers), main.py (app setup + CORS)
• script/fastapi/setup and script/fastapi/start for Mac/Linux/WSL, plus .bat equivalents for Windows, modeled on the Django scripts
• Pinned dependencies (fastapi==0.139.0, uvicorn==0.51.0) and a framework README.md covering setup and how to add a new module
• Root README.md updated to list fastapi in the framework choices, setup examples, and folder index

Verified: both endpoints return the same response as the Django backend ({"success": true} with Access-Control-Allow-Origin: *), and the Foo and Bar sites fire the "Yay! Everything works" alert against it.

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	pypi/​uvicorn@​0.51.0
	pypi/​fastapi@​0.139.0

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