Project scaffold + Connexion app (create project skeleton and Connexion app with openapi.yaml)

[raggopaluni]

Goal:

• Create repo skeleton, add Connexion Flask app and openapi.yaml from the provided snippet.
• Make GET /orders/{order_id} and POST /orders endpoints stub return sample data.

Tasks:

• Add openapi.yaml to repo root.
• Implement api/app.py with Connexion app factory that loads openapi.yaml
• Implement api/orders.py with stub functions:
  • create_order(body) -> returns 201 with {"order_id": "tmp-uuid", "status": "created"}
  • get_order(order_id) -> returns 200 with sample JSON
• Add README with run instructions.
• Add requirements.txt (connexion, flask, pydantic (opt), python-dotenv)

Acceptance criteria:

• docker-compose not required yet. python -m api.app or flask run starts service.
• Calling endpoints returns sample JSON.

[raggopaluni]

1. Referring to the OpenAPI specification documentation here(https://swagger.io/specification/) to structure the openapi spec file