001 Project structure

app/controllers/__init__.py

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+"""HTTP layer components."""

app/controllers/http_client.py

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+"""Controller-level HTTP client factory."""
+
+from httpx import AsyncClient
+
+
+def build_controller_http_client(timeout_seconds: float) -> AsyncClient:
+    return AsyncClient(timeout=timeout_seconds)

app/controllers/middleware.py

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+"""HTTP middleware registration."""
+
+from fastapi import FastAPI
+
+
+def install_middleware(app: FastAPI) -> None:
+    """Register middleware components for the API."""
+
+    # Middleware stack is introduced in later tasks.
+    _ = app

app/controllers/v1/__init__.py

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+"""Versioned API controllers."""

app/controllers/v1/delivery.py

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+"""Delivery API controller skeleton."""
+
+from fastapi import APIRouter
+
+router = APIRouter(prefix="/delivery", tags=["delivery"])