MAESTRO: scaffold backend fastapi app

backend/app/__init__.py

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+"""Backend application package."""

backend/app/main.py

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+from fastapi import FastAPI
+
+app = FastAPI(title="Web Header Analyzer API")
+
+
+@app.get("/")
+def read_root() -> dict[str, str]:
+    return {"status": "ok"}

backend/pyproject.toml

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+[build-system]
+requires = ["setuptools>=69", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "web-header-analyzer-backend"
+version = "0.1.0"
+description = "FastAPI backend for the web header analyzer"
+readme = "../README.md"
+requires-python = ">=3.13"
+dependencies = [
+  "fastapi>=0.110",
+  "uvicorn[standard]>=0.27",
+]
+
+[project.optional-dependencies]
+dev = [
+  "pytest>=8.0",
+  "pytest-asyncio>=0.23",
+  "httpx>=0.27",
+  "ruff>=0.4",
+]
+
+[tool.pytest.ini_options]
+minversion = "8.0"
+testpaths = ["tests"]
+pythonpath = ["."]
+
+[tool.ruff]
+line-length = 88
+target-version = "py313"
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "B"]

backend/requirements.txt

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+fastapi>=0.110
+uvicorn[standard]>=0.27
+pytest>=8.0
+pytest-asyncio>=0.23
+httpx>=0.27
+ruff>=0.4

backend/tests/__init__.py

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+"""Backend tests package."""

backend/tests/test_main.py

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+from fastapi.testclient import TestClient
+
+from app.main import app
+
+
+client = TestClient(app)
+
+
+def test_root_returns_ok() -> None:
+    response = client.get("/")
+    assert response.status_code == 200
+    assert response.json() == {"status": "ok"}