Sync fastapi docs from 50fa3f7c on 2026-01-11

docs_src/response_model/tutorial003_02_py39.py

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+from fastapi import FastAPI, Response
+from fastapi.responses import JSONResponse, RedirectResponse
+
+app = FastAPI()
+
+
+@app.get("/portal")
+async def get_portal(teleport: bool = False) -> Response:
+    if teleport:
+        return RedirectResponse(url="https://www.youtube.com/watch?v=dQw4w9WgXcQ")
+    return JSONResponse(content={"message": "Here's your interdimensional portal."})