feat: stage0 — init Python package, FastAPI health endpoint, tests

src/gps_denied/__init__.py

@@ -0,0 +1,3 @@
+"""GPS-Denied Onboard — UAV geolocalization service."""
+
+__version__ = "0.1.0"

src/gps_denied/__main__.py

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+"""Entry point: python -m gps_denied."""
+
+import uvicorn
+
+
+def main() -> None:
+    uvicorn.run(
+        "gps_denied.app:app",
+        host="127.0.0.1",
+        port=8000,
+        reload=True,
+    )
+
+
+if __name__ == "__main__":
+    main()

src/gps_denied/app.py

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+"""FastAPI application factory."""
+
+from fastapi import FastAPI
+
+from gps_denied import __version__
+
+
+def create_app() -> FastAPI:
+    """Create and configure the FastAPI application."""
+    application = FastAPI(
+        title="GPS-Denied Onboard",
+        version=__version__,
+        description="UAV geolocalization service for GPS-denied environments",
+    )
+
+    @application.get("/health")
+    async def health() -> dict:
+        return {"status": "ok"}
+
+    return application
+
+
+app = create_app()