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

src/gps_denied/app.py

@@ -0,0 +1,23 @@
+"""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()