chore: init monorepo snapshot

services/rag_gateway/app/main.py

@@ -0,0 +1,12 @@
+from fastapi import FastAPI
+
+from app.api.routes import router as api_router
+from app.core.config import get_gateway_settings
+from app.core.logging import setup_logging
+
+settings = get_gateway_settings()
+
+setup_logging()
+
+app = FastAPI(title=settings.app_name)
+app.include_router(api_router, prefix=settings.api_prefix)